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2014-09-27Merge branch 'for-3.17-fixes' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup fixes from Tejun Heo: "This is quite late but these need to be backported anyway. This is the fix for a long-standing cpuset bug which existed from 2009. cpuset makes use of PF_SPREAD_{PAGE|SLAB} flags to modify the task's memory allocation behavior according to the settings of the cpuset it belongs to; unfortunately, when those flags have to be changed, cpuset did so directly even whlie the target task is running, which is obviously racy as task->flags may be modified by the task itself at any time. This obscure bug manifested as corrupt PF_USED_MATH flag leading to a weird crash. The bug is fixed by moving the flag to task->atomic_flags. The first two are prepatory ones to help defining atomic_flags accessors and the third one is the actual fix" * 'for-3.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags sched: add macros to define bitops for task atomic flags sched: fix confusing PFA_NO_NEW_PRIVS constant
2014-09-26coccinelle: misc: semantic patch to delete overly complex return code processingJulia Lawall1-0/+180
This semantic patch simplifies cases where the effect of the processing of a function call's return code is just to return the result of the function directly. It may also delete a local return flag variable, if this is no longer used. This was proposed by Uwe Kleine-König. Signed-off-by: Julia Lawall <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-09-24sched: add macros to define bitops for task atomic flagsZefan Li1-0/+6
This will simplify code when we add new flags. v3: - Kees pointed out that no_new_privs should never be cleared, so we shouldn't define task_clear_no_new_privs(). we define 3 macros instead of a single one. v2: - updated scripts/tags.sh, suggested by Peter Cc: Ingo Molnar <[email protected]> Cc: Miao Xie <[email protected]> Cc: Tetsuo Handa <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Kees Cook <[email protected]> Signed-off-by: Zefan Li <[email protected]> Signed-off-by: Tejun Heo <[email protected]>
2014-09-23kconfig/lxdialog: get ncurses CFLAGS with pkg-configBjørn Forsman1-1/+5
This makes "make menuconfig" also work on systems where ncurses is not installed in a standard location (such as on NixOS). This patch changes ccflags() so that it tries pkg-config first, and only if pkg-config fails does it go back to the fallback/manual checks. This is the same algorithm that ldflags() already uses. Signed-off-by: Bjørn Forsman <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-09-22Merge branches 'tiny/bloat-o-meter-no-SyS', 'tiny/more-procless', ↵Josh Triplett1-0/+19
'tiny/no-advice', 'tiny/tinyconfig' and 'tiny/x86-boot-compressed-use-yn' into tiny/next
2014-09-12deb-pkg: Add support for powerpc little endianMichael Neuling1-1/+1
The Debian powerpc little endian architecture is called ppc64el. This is the default architecture used by Ubuntu for powerpc. The below checks the kernel config to see if we are compiling little endian and sets the Debian arch appropriately. Signed-off-by: Michael Neuling <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-09-10checkpatch: allow commit descriptions on separate line from commit idJoe Perches1-1/+4
The general form for commit id and description is 'Commit <12+hexdigits> ("commit description/subject line")' but commit logs often have relatively long commit ids and the commit description emds on the next line like: Some explanation as to why commit <12+hexdigits> ("commit foo description/subject line") is improved. Allow this form. Signed-off-by: Joe Perches <[email protected]> Suggested-by: Joe Lawrence <[email protected]> Tested-by: Joe Lawrence <[email protected]> Suggested-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-09-01treewide: fix errors in printkMasanari Iida1-1/+1
This patch fix spelling typo in printk. Signed-off-by: Masanari Iida <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: Randy Dunlap <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2014-08-29checkpatch: relax check for length of git commit IDsJoe Perches1-2/+2
Checkpatch currently warns if a git commit ID (in the changelog, usually) is less than 12 characters or more than 16. The "more than 16" is excessive. Change the check so we accept IDs from 12 to 40 chars in length. Cc: Geert Uytterhoeven <[email protected] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-28checkstack.pl: port to AArch64Kyle McMartin1-2/+5
AArch64 stores the frame pointer and return pointer, and decrements the stack. Also remove my (no longer valid) email address. Signed-off-by: Kyle McMartin <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
2014-08-27kbuild: handle module compression while running 'make modules_install'.Bertrand Jacquin1-1/+2
Since module-init-tools (gzip) and kmod (gzip and xz) support compressed modules, it could be useful to include a support for compressing modules right after having them installed. Doing this in kbuild instead of per distro can permit to make this kind of usage more generic. This patch add a Kconfig entry to "Enable loadable module support" menu and let you choose to compress using gzip (default) or xz. Both gzip and xz does not used any extra -[1-9] option since Andi Kleen and Rusty Russell prove no gain is made using them. gzip is called with -n argument to avoid storing original filename inside compressed file, that way we can save some more bytes. On a v3.16 kernel, 'make allmodconfig' generated 4680 modules for a total of 378MB (no strip, no sign, no compress), the following table shows observed disk space gain based on the allmodconfig .config : | time | +-------------+-----------------+ | manual .ko | make | size | percent | compression | modules_install | | gain +-------------+-----------------+------+-------- - | | 18.61s | 378M | GZIP | 3m16s | 3m37s | 102M | 73.41% XZ | 5m22s | 5m39s | 77M | 79.83% The gain for restricted environnement seems to be interesting while uncompress can be time consuming but happens only while loading a module, that is generally done only once. This is fully compatible with signed modules while the signed module is compressed. module-init-tools or kmod handles decompression and provide to other layer the uncompressed but signed payload. Reviewed-by: Willy Tarreau <[email protected]> Signed-off-by: Bertrand Jacquin <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2014-08-27modinst: wrap long lines in order to enhance cmd_modules_installBertrand Jacquin1-1/+5
Note: shouldn't we use 'install -D $(2)/$@ $@' instead of mkdir and cp ? Reviewed-by: Willy Tarreau <[email protected]> Signed-off-by: Bertrand Jacquin <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2014-08-27modsign: lookup lines ending in .ko in .mod filesBertrand Jacquin1-1/+1
This does the same as commit ef591a5 (scripts/Makefile.modpost: error in finding modules from .mod files), but for scripts/Makefile.modsign Maybe we should also apply to Makefile.modsign and Makefile.modinst the change applied to Makefile.modpost by commit ea4054a (modpost: handle huge numbers of modules) ? Reviewed-by: Willy Tarreau <[email protected]> Signed-off-by: Bertrand Jacquin <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2014-08-27modpost: simplify file name generation of *.mod.c filesMathias Krause1-1/+1
Avoid the variable length array (vla), just use PATH_MAX instead. This not only makes this code clang friedly, it also leads to a code size reduction: text data bss dec hex filename 51765 2224 12416 66405 10365 scripts/mod/modpost.old 51677 2224 12416 66317 1030d scripts/mod/modpost.new Signed-off-by: Mathias Krause <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2014-08-27modpost: reduce visibility of symbols and constify r/o arraysMathias Krause1-11/+12
Internally used symbols of modpost don't need to be externally visible; make them static. Also constify the string arrays so they resist in the r/o section instead of being runtime writable. Those changes lead to a small size reduction as can be seen below: text data bss dec hex filename 51381 2640 12416 66437 10385 scripts/mod/modpost.old 51765 2224 12416 66405 10365 scripts/mod/modpost.new Signed-off-by: Mathias Krause <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
2014-08-26scripts/kernel-doc: recognize __meminitRandy Dunlap1-0/+1
Fix scripts/kernel-doc to recognize __meminit in a function prototype and to strip it, as done with many other attributes. Fixes this warning: Warning(..//mm/page_alloc.c:2973): cannot understand function prototype: 'void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask) ' Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-26builddeb: put the dbg files into the correct directoryMichal Marek1-12/+10
Since the conversion of objtree to use relative pathnames (commit 7e1c04779e, "kbuild: Use relative path for $(objtree)"), the debug info files have been ending up in /debian/dbgtmp/ in the regular linux-image package instead of the debug files package. Fix up the paths so that the debug files end up in the -dbg package. This is based on a similar patch by Darrick. Reported-and-tested-by: "Darrick J. Wong" <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-23bloat-o-meter: Ignore syscall aliases SyS_ and compat_SyS_Josh Triplett1-0/+2
This avoids double-counting size changes in syscall implementations. Signed-off-by: Josh Triplett <[email protected]>
2014-08-22kconfig: nconfig: fix multi-byte UTF handlingBrian Norris1-1/+2
Currently, Kconfig descriptions that use multi-byte UTF-8 characters (such as MTD_NAND_CAFE) will have their menu entries dropped from the 'make nconfig' ncurses menu, and all subsequent entries in the same window will be omitted. This seems to be due to the ncurses 'menu' library, which does not traditionally handle UTF-8 >8-bit characters properly. The ncursesw library ('w' is for "wide") is written to handle these UTF-8 characters, and is practically a drop-in replacement at the source level. Use it by default, if available. Link: https://bugzilla.kernel.org/show_bug.cgi?id=43067 Signed-off-by: Brian Norris <[email protected]> Cc: "Yann E. MORIN" <[email protected]> Cc: Martin Walch <[email protected]> Acked-by: Sam Ravnborg <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-22kconfig: lxdialog: fix spellingBrian Norris1-1/+1
Signed-off-by: Brian Norris <[email protected]> Cc: "Yann E. MORIN" <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-20kbuild: Make scripts executableMichal Marek23-0/+0
The Makefiles call the respective interpreter explicitly, but this makes it easier to use the scripts manually. Signed-off-by: Michal Marek <[email protected]>
2014-08-19scripts/tags.sh: fix DEFINE_HASHTABLE in emacs caseDirk Gouders1-1/+1
The emacs --regex for DEFINE_HASHTABLE produced a warning because of an unmatched '\('. Further, the whole entry did not work, because the regex needs to match from the beginning of a line, including keywords like 'static'. Finally, '\w' should not be used, because it stops at underscores which are often part of variable names in C, resulting in wrong entries in the tags file. Signed-off-by: Dirk Gouders <[email protected]> Inspired-by: Masatake YAMATO <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19scripts/tags.sh: remove *PCGFLAGS regular expressionsDirk Gouders1-8/+0
Commit 0a31bc97c80c3fa8 (mm: memcontrol: rewrite uncharge API) removed the macros {TEST,SET,CLEAR,TESTCLEAR}PCFLAG. Remove corresponding entries from tags.sh -- in the emacs case they also produced warnigs because of unmatched '\('. Signed-off-by: Dirk Gouders <[email protected]> Inspired-by: Masatake YAMATO <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19scripts/tags.sh: Don't specify kind-spec for emacs' ctags/etagsDirk Gouders1-1/+1
Emacs' ctags/etags don't know about kind-spec in --regex and produce warnings: etags: invalid regexp modifier `v', ignoring etags: invalid regexp modifier `/', ignoring Fix it by removing kind-spec for the emacs case. Signed-off-by: Dirk Gouders <[email protected]> Inspired-by: Masatake YAMATO <[email protected]> Tested-by: Masatake YAMATO <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19kbuild: remove redundant clean-files from scripts/kconfig/MakefileMasahiro Yamada1-1/+0
Now mconf, qconf, gconf, nconf are always added to hostprogs-y. Files added to hostprogs-y are removed by "make clean". Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19kbuild: refactor script/kconfig/MakefileMasahiro Yamada1-31/+3
Now it is harmless to add all host programs to hostprogs-y. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19kbuild: handle the dependency of multi-objs hostprogs appropriatelyMasahiro Yamada1-2/+4
Assume we have a Makefile like: hostprogs-y := foo bar foo-objs := foo1.o foo2.o bar-objs := bar1.o bar2.o Without this commit, the host program foo depends on all of foo1.o foo2.o bar1.o bar2.o. This commit allows to handle the dependency of each host program separately. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-19kbuild: handle multi-objs dependency appropriatelyMasahiro Yamada2-6/+13
The comment in scripts/Makefile.build says as follows: We would rather have a list of rules like foo.o: $(foo-objs) but that's not so easy, so we rather make all composite objects depend on the set of all their parts This commit makes it possible! For example, assume a Makefile like this obj-m = foo.o bar.o foo-objs := foo1.o foo2.o bar-objs := bar1.o bar2.o Without this patch, foo.o depends on all of foo1.o foo2.o bar1.o bar2.o. It looks funny that foo.o is regenerated when bar1.c is updated. Now we can handle the dependency of foo.o and bar.o separately. Signed-off-by: Masahiro Yamada <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-14Merge tag 'pm+acpi-3.17-rc1-2' of ↵Linus Torvalds1-836/+2981
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are a couple of regression fixes, cpuidle menu governor optimizations, fixes for ACPI proccessor and battery drivers, hibernation fix to avoid problems related to the e820 memory map, fixes for a few cpufreq drivers and a new version of the suspend profiling tool analyze_suspend.py. Specifics: - Fix for an ACPI-based device hotplug regression introduced in 3.14 that causes a kernel panic to trigger when memory hot-remove is attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen - Fix for a cpufreq regression introduced in 3.16 that triggers a "sleeping function called from invalid context" bug in dev_pm_opp_init_cpufreq_table() from Stephen Boyd - ACPI battery driver fix for a warning message added in 3.16 that prints silly stuff sometimes from Mariusz Ceier - Hibernation fix for safer handling of mismatches in the 820 memory map between the configurations during image creation and during the subsequent restore from Chun-Yi Lee - ACPI processor driver fix to handle CPU hotplug notifications correctly during system suspend/resume from Lan Tianyu - Series of four cpuidle menu governor cleanups that also should speed it up a bit from Mel Gorman - Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus Pargmann and Uwe Kleine-König - Version 3.0 of the analyze_suspend.py suspend profiling tool from Todd E Brandt" * tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / battery: Fix warning message in acpi_battery_get_state() PM / tools: analyze_suspend.py: update to v3.0 cpufreq: arm_big_little: fix module license spec cpufreq: speedstep-smi: fix decimal printf specifiers ACPI / hotplug: Check scan handlers in acpi_scan_hot_remove() cpufreq: OPP: Avoid sleeping while atomic cpufreq: cpu0: Do not print error message when deferring cpufreq: integrator: Use set_cpus_allowed_ptr PM / hibernate: avoid unsafe pages in e820 reserved regions ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events cpuidle: menu: Lookup CPU runqueues less cpuidle: menu: Call nr_iowait_cpu less times cpuidle: menu: Use ktime_to_us instead of reinventing the wheel cpuidle: menu: Use shifts when calculating averages where possible
2014-08-14Merge branch 'misc' of ↵Linus Torvalds5-27/+258
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull misc kbuild updates from Michal Marek: "This is the non-critical part of kbuild for 3.17-rc1: - make help hint to use make -s with make kernelrelease et al. - moved a kbuild document to Documentation/kbuild where it belongs - four new Coccinelle scripts, one dropped and one fixed - new make kselftest target to run various tests on the kernel" * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: kselftest - new make target to build and run kernel selftests Coccinelle: Script to replace if and BUG with BUG_ON Coccinelle: Script to detect incorrect argument to sizeof Coccinelle: Script to use ARRAY_SIZE instead of division of two sizeofs Coccinelle: Script to detect cast after memory allocation coccinelle/null: solve parse error Documentation: headers_install.txt is part of kbuild kbuild: make -s should be used with kernelrelease/kernelversion/image_name
2014-08-14Merge branch 'kbuild' of ↵Linus Torvalds4-70/+30
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild updates from Michal Marek: - make clean also considers $(extra-m) and $(extra-) to be consistent - cleanup and fixes in scripts/Makefile.host - allow to override the name of the Python 2 executable with make PYTHON=... (only needed for ia64 in practice) - option to split debugingo into *.dwo files to save disk space if the compiler supports it (CONFIG_DEBUG_INFO_SPLIT) - option to use dwarf4 debuginfo if the compiler supports it (CONFIG_DEBUG_INFO_DWARF4) - fix for disabling certain warnings with clang - fix for unneeded rebuild with dash when a command contains backslashes * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: Fix handling of backslashes in *.cmd files kbuild, LLVMLinux: Supress warnings unless W=1-3 Kbuild: Add a option to enable dwarf4 v2 kbuild: Support split debug info v4 kbuild: allow to override Python command name kbuild: clean-up and bug fix of scripts/Makefile.host kbuild: clean up scripts/Makefile.host kbuild: drop shared library support from Makefile.host kbuild: fix a bug of C++ host program handling kbuild: fix a typo in scripts/Makefile.host scripts/Makefile.clean: clean also $(extra-m) and $(extra-)
2014-08-11Merge branch 'pm-tools'Rafael J. Wysocki1-836/+2981
* pm-tools: PM / tools: analyze_suspend.py: update to v3.0
2014-08-10Merge tag 'modules-next-for-linus' of ↵Linus Torvalds1-44/+14
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module updates from Rusty Russell: "This finally applies the stricter sysfs perms checking we pulled out before last merge window. A few stragglers are fixed (thanks linux-next!)" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: arch/powerpc/platforms/powernv/opal-dump.c: fix world-writable sysfs files arch/powerpc/platforms/powernv/opal-elog.c: fix world-writable sysfs files drivers/video/fbdev/s3c2410fb.c: don't make debug world-writable. ARM: avoid ARM binutils leaking ELF local symbols scripts: modpost: Remove numeric suffix pattern matching scripts: modpost: fix compilation warning sysfs: disallow world-writable files. module: return bool from within_module*() module: add within_module() function modules: Fix build error in moduleloader.h
2014-08-09PM / tools: analyze_suspend.py: update to v3.0Todd E Brandt1-836/+2981
Update of analyze_suspend.py to v3.0 New features include back-2-back suspend testing, device filters to reduce the html size, the inclusion of device_prepare and device_complete callbacks, a usb topography list, and the ability to control USB device autosuspend. UI upgrades include a device detail window and mini-timeline, the addition of a suspend_prepare and resume_complete phase to the timeline which includes the associated device callbacks, automatic highlight of related callbacks, and general color and name changes for better reability. The new version relies on two trace point patches that are already in the kernel: enable_trace_events_suspend_resume.patch enable_trace_events_device_pm_callback.patch It has legacy support for older kernels without these trace events, but when available the tool processes the ftrace output alone (dmesg has been deprecated as a tool input, and is only gathered for convenience). Link: https://01.org/suspendresume/downloads/analyzesuspend-v3.0 Signed-off-by: Todd Brandt <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2014-08-08x86: Add "make tinyconfig" to configure the tiniest possible kernelJosh Triplett1-0/+5
Since commit 5d2acfc7b974bbd3858b4dd3f2cdc6362dd8843a ("kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT") in 3.15-rc1, "make allnoconfig" disables every possible config option. However, a few configuration options (CC_OPTIMIZE_FOR_SIZE, OPTIMIZE_INLINING) produce a smaller kernel when turned on, and a few choices exist (compression, highmem, allocator) for which a non-default option produces a smaller kernel. Add a "tinyconfig" option, which starts from allnoconfig and then sets these options to configure the tiniest possible kernel. This provides a better baseline for embedded systems or efforts to reduce kernel size. Signed-off-by: Josh Triplett <[email protected]>
2014-08-08x86, platform, kconfig: move kvmconfig functionality to a helperJosh Triplett1-0/+14
The new mergeconfig helper makes it easier to add other partial configurations similar to kvmconfig. Architecture-independent portions of those partial configurations should go in kernel/configs/${name}.config, and architecture-dependent portions should go in arch/${arch}/configs/${name}.config. Based on a patch by Luis R. Rodriguez <[email protected]>. Originally-Signed-off-by: Luis R. Rodriguez <[email protected]> Modified to make the helper name more general than just virtualization, support architecture-dependent and architecture-independent partial configurations, move the helper and kvmconfig to scripts/kconfig/Makefile, and factor out more of the common file path. Signed-off-by: Josh Triplett <[email protected]>
2014-08-08kernel: build bin2c based on config option CONFIG_BUILD_BIN2CVivek Goyal1-1/+1
currently bin2c builds only if CONFIG_IKCONFIG=y. But bin2c will now be used by kexec too. So make it compilation dependent on CONFIG_BUILD_BIN2C and this config option can be selected by CONFIG_KEXEC and CONFIG_IKCONFIG. Signed-off-by: Vivek Goyal <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Michael Kerrisk <[email protected]> Cc: Yinghai Lu <[email protected]> Cc: Eric Biederman <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Matthew Garrett <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Dave Young <[email protected]> Cc: WANG Chao <[email protected]> Cc: Baoquan He <[email protected]> Cc: Andy Lutomirski <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-08bin2c: move bin2c in scripts/basicVivek Goyal5-6/+5
This patch series does not do kernel signature verification yet. I plan to post another patch series for that. Now distributions are already signing PE/COFF bzImage with PKCS7 signature I plan to parse and verify those signatures. Primary goal of this patchset is to prepare groundwork so that kernel image can be signed and signatures be verified during kexec load. This should help with two things. - It should allow kexec/kdump on secureboot enabled machines. - In general it can help even without secureboot. By being able to verify kernel image signature in kexec, it should help with avoiding module signing restrictions. Matthew Garret showed how to boot into a custom kernel, modify first kernel's memory and then jump back to old kernel and bypass any policy one wants to. This patch (of 15): Kexec wants to use bin2c and it wants to use it really early in the build process. See arch/x86/purgatory/ code in later patches. So move bin2c in scripts/basic so that it can be built very early and be usable by arch/x86/purgatory/ Signed-off-by: Vivek Goyal <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Michael Kerrisk <[email protected]> Cc: Yinghai Lu <[email protected]> Cc: Eric Biederman <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Matthew Garrett <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Dave Young <[email protected]> Cc: WANG Chao <[email protected]> Cc: Baoquan He <[email protected]> Cc: Andy Lutomirski <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-08scripts/checkstack.pl: automatically handle 32-bit and 64-bit mode for ARCH=x86Konstantin Khlebnikov1-7/+5
This patch adds support for ARCH=x86 into checkstack. Commit ffee0de411fd ("x86: Default to ARCH=x86 to avoid overriding CONFIG_64BIT") had merged ARCH=i386 and ARCH=x86_64 into one ARCH=x86. checkstack.pl searches patterns of machine instructions which are usually used for allocating stack frames. checkstalk.pl needs either i386 or x86_64, x86 isn't enough: $ make checkstack objdump -d vmlinux $(find . -name '*.ko') | \ perl linux/scripts/checkstack.pl x86 wrong or unknown architecture "x86" Signed-off-by: Konstantin Khlebnikov <[email protected]> Cc: David Woodhouse <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-08scripts/tags.sh: include compat_sys_* symbols in the generated tagsCatalin Marinas1-0/+2
Since the kernel now has a COMPAT_SYSCALL infrastructure via commit 468366138850 ("COMPAT_SYSCALL_DEFINE: infrastructure"), add the corresponding regex for generating compat_sys_* symbols in the tags files (similar to sys_*). Signed-off-by: Catalin Marinas <[email protected]> Cc: Alexander Viro <[email protected]> Cc: Michal Marek <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-08scripts/coccinelle/free/ifnullfree.cocci: add copyright informationFabian Frederick1-2/+3
All coccinelle scripts have a copyright in the header. Signed-off-by: Fabian Frederick <[email protected]> Suggested-by: Julia Lawall <[email protected]> Acked-by: Julia Lawall <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-08scripts/coccinelle/free: add NULL test before freeing functionsFabian Frederick1-0/+52
Warns or generates patch for NULL check before the following functions: kfree usb_free_urb debugfs_remove debugfs_remove_recursive Signed-off-by: Fabian Frederick <[email protected]> Acked-by: Julia Lawall <[email protected]> Cc: Gilles Muller <[email protected]> Cc: Joe Perches <[email protected]> Cc: Markus Elfring <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-07kbuild: Fix handling of backslashes in *.cmd filesMichal Marek1-6/+8
Commit c353acba ("kbuild: make: fix if_changed when command contains backslashes") attempted to handle backslashes in *.cmd files, but it only handled double backslashes for some reason. Changing make-cmd to also handle single backslashes fixes rebuilds with dash, but it breaks bash again. The reason is that the two shells disagree about the interpretation of backslash sequences in the echo builtin. The way out of this is to print the command with printf '%s\n'. While at it, document what the individual parts of make-cmd do and why. Reported-and-tested-by: Konstantin Khlebnikov <[email protected]> Reviewed-by: Sam Ravnborg <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2014-08-06Merge branch 'akpm' (patchbomb from Andrew Morton)Linus Torvalds1-111/+470
Merge incoming from Andrew Morton: - Various misc things. - arch/sh updates. - Part of ocfs2. Review is slow. - Slab updates. - Most of -mm. - printk updates. - lib/ updates. - checkpatch updates. * emailed patches from Andrew Morton <[email protected]>: (226 commits) checkpatch: update $declaration_macros, add uninitialized_var checkpatch: warn on missing spaces in broken up quoted checkpatch: fix false positives for --strict "space after cast" test checkpatch: fix false positive MISSING_BREAK warnings with --file checkpatch: add test for native c90 types in unusual order checkpatch: add signed generic types checkpatch: add short int to c variable types checkpatch: add for_each tests to indentation and brace tests checkpatch: fix brace style misuses of else and while checkpatch: add --fix option for a couple OPEN_BRACE misuses checkpatch: use the correct indentation for which() checkpatch: add fix_insert_line and fix_delete_line helpers checkpatch: add ability to insert and delete lines to patch/file checkpatch: add an index variable for fixed lines checkpatch: warn on break after goto or return with same tab indentation checkpatch: emit a warning on file add/move/delete checkpatch: add test for commit id formatting style in commit log checkpatch: emit fewer kmalloc_array/kcalloc conversion warnings checkpatch: improve "no space after cast" test checkpatch: allow multiple const * types ...
2014-08-06Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree changes from Jiri Kosina: "Summer edition of trivial tree updates" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits) doc: fix two typos in watchdog-api.txt irq-gic: remove file name from heading comment MAINTAINERS: Add miscdevice.h to file list for char/misc drivers. scsi: mvsas: mv_sas.c: Fix for possible null pointer dereference doc: replace "practise" with "practice" in Documentation befs: remove check for CONFIG_BEFS_RW scsi: doc: fix 'SCSI_NCR_SETUP_MASTER_PARITY' drivers/usb/phy/phy.c: remove a leading space mfd: fix comment cpuidle: fix comment doc: hpfall.c: fix missing null-terminate after strncpy call usb: doc: hotplug.txt code typos kbuild: fix comment in Makefile.modinst SH: add proper prompt to SH_MAGIC_PANEL_R2_VERSION ARM: msm: Remove MSM_SCM crypto: Remove MPILIB_EXTRA doc: CN: remove dead link, kerneltrap.org no longer works media: update reference, kerneltrap.org no longer works hexagon: update reference, kerneltrap.org no longer works doc: LSM: update reference, kerneltrap.org no longer works ...
2014-08-06checkpatch: update $declaration_macros, add uninitialized_varJoe Perches1-5/+6
Using uninitialized_var reports a false positive for "Missing blank line after declarations". Fix it by adding uninitialized_var to the $declaration_macros exceptions list. Move the macro list after $Type is declared. Add optional prefixes to DECLARE_<FOO> and DEFINE_<BAR> macro declarations to allow forms like: MLX4_DECLARE_DOORBELL_LOCK Signed-off-by: Joe Perches <[email protected]> Reported-by: Dotan Barak <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-06checkpatch: warn on missing spaces in broken up quotedDan Carpenter1-0/+6
Checkpatch already complains when people break up quoted strings but it's still pretty common. One mistake that people often make is they leave out the space character between the two strings. This check adds around 450 new warnings and has a low rate of false positives. Signed-off-by: Dan Carpenter <[email protected]> Cc: Andy Whitcroft <[email protected]> Acked-by: Joe Perches <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-06checkpatch: fix false positives for --strict "space after cast" testJoe Perches1-1/+1
Commit 89da401f6cff ("checkpatch: improve "no space after cast" test") in -next improved the cast test for non pointer types, but also introduced false positives for some types of static inlines. Add a test for an open brace to the exclusions to avoid these false positives. Signed-off-by: Joe Perches <[email protected]> Reported-by: Hartley Sweeten <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-06checkpatch: fix false positive MISSING_BREAK warnings with --fileJoe Perches1-2/+2
Using --file mode can give false positives with MISSING_BREAK fall-through warnings on simple but long multiple consecutive case statements. Look for all lines before a case statement for a switch or a statement when using --file mode. Fix a misspelling of preceded while there. Signed-off-by: Joe Perches <[email protected]> Reported-by: Lee Jones <[email protected]> Acked-by: Lee Jones <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2014-08-06checkpatch: add test for native c90 types in unusual orderJoe Perches1-0/+44
c90 section "6.7.2 Type Specifiers" says: "type specifiers may occur in any order" That means that: short int is the same as int short unsigned short int is the same as int unsigned short etc... checkpatch currently parses only a subset of these allowed types. For instance: "unsigned short" and "signed short" are found by checkpatch as a specific type, but none of the or "int short" or "int signed short" variants are found. Add another table for the "kernel style misordered" variants. Add this misordered table to the findable types. Warn when the misordered style is used. This improves the "Missing a blank line after declarations" test as it depends on the correct parsing of the $Declare variable which looks for "$Type $Ident;" (ie: declarations like "int foo;"). Signed-off-by: Joe Perches <[email protected]> Acked-by: Andy Whitcroft <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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