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2016-08-04um: Support kcovVegard Nossum4-0/+12
This adds support for kcov to UML. There is a small problem where UML will randomly segfault during boot; this is because current_thread_info() occasionally returns an invalid (non-NULL) pointer and we try to dereference it in __sanitizer_cov_trace_pc(). I consider this a bug in UML itself and this patch merely exposes it. [v2: disable instrumentation in UML-specific code] Cc: Quentin Casasnovas <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Thomas Meyer <[email protected]> Cc: user-mode-linux-devel <[email protected]> Cc: Dmitry Vyukov <[email protected]> Signed-off-by: Vegard Nossum <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2016-08-04um: Enable TRACE_IRQFLAGS_SUPPORTRichard Weinberger1-2/+1
Now we have everything we need, so enable TRACE_IRQFLAGS_SUPPORT. Signed-off-by: Richard Weinberger <[email protected]>
2016-08-04um: Use asm-generic/irqflags.hDaniel Wagner1-11/+7
Instead proving its own arch_local_irq_save() and arch_irqs_disabled() version use the generic version from asm-generic/irqflags.h. A nice side effect is that um gets a few additional arch_ functions as well. Signed-off-by: Daniel Wagner <[email protected]> [rw: Massaged commit message] Signed-off-by: Richard Weinberger <[email protected]>
2016-08-04um: Fix possible deadlock in sig_handler_common()Richard Weinberger1-2/+3
We are in atomic context and must not sleep. Sleeping here is possible since malloc() maps to kmalloc() with GFP_KERNEL. Cc: [email protected] Fixes: b6024b21 ("um: extend fpstate to _xstate to support YMM registers") Signed-off-by: Richard Weinberger <[email protected]>
2016-08-03drm: i915: fix build when DEBUG_FS is disabledLinus Torvalds1-2/+2
This clearly had never gotten tested, probably because you need a fairly minimal configuration in order to disable DEBUG_FS (several other options select it). The dummy inline functions that were used for the no-DEBUG_FS case were missing the argument names in the declarations. Fixes: 1dac891c1c95 ("drm/i915: Register debugfs interface last") Reported-and-tested-by: Jörg Otte <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-04um: Select HAVE_DEBUG_KMEMLEAKRichard Weinberger1-0/+1
Now we have the infrastructure to support kmemleak. Enable the HAVE flag. Signed-off-by: Richard Weinberger <[email protected]>
2016-08-04um: Setup physical memory in setup_arch()Richard Weinberger1-4/+4
Currently UML sets up physical memory very early, long before setup_arch() was called by the kernel main function. This can cause problems when code paths in UML's memory setup code assume that the kernel is already running. i.e. when kmemleak is enabled it will evaluate current() in free_bootmem(). That early current() is undefined and UML explodes. Solve the problem by setting up physical memory in setup_arch(), at this stage the kernel has materialized and basic infrastructure such as current() works. Signed-off-by: Richard Weinberger <[email protected]>
2016-08-04um: Eliminate null test after alloc_bootmemAmitoj Kaur Chawla1-2/+0
alloc_bootmem function never returns NULL. Thus a NULL test after a call to this function is unnecessary. The Coccinelle semantic patch used to make this change is follows: @@ expression E; statement S; @@ E = alloc_bootmem(...) ... when != E - if (E == NULL) S Signed-off-by: Amitoj Kaur Chawla <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2016-08-03Btrfs: fix __MAX_CSUM_ITEMSChris Mason1-2/+3
Jeff Mahoney's cleanup commit (14a1e067b4) wasn't correct for csums on machines where the pagesize >= metadata blocksize. This just reverts the relevant hunks to bring the old math back. Signed-off-by: Chris Mason <[email protected]>
2016-08-03Merge tag 'trace-v4.8-1' of ↵Linus Torvalds4-9/+19
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: "A few updates and fixes: - move the suppressing of the __builtin_return_address >0 warning to the tracing directory only. - metag recordmcount fix for newer glibc's - two tracing histogram fixes that were reported by KASAN" * tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Fix use-after-free in hist_register_trigger() tracing: Fix use-after-free in hist_unreg_all/hist_enable_unreg_all Makefile: Mute warning for __builtin_return_address(>0) for tracing only ftrace/recordmcount: Work around for addition of metag magic but not relocations
2016-08-03fs/proc: Add compiler check for -Wno-override-init to support gcc < 4.2Geert Uytterhoeven1-1/+1
With gcc < 4.2 (e.g. 4.1.2): CC fs/proc/task_mmu.o cc1: error: unrecognized command line option "-Wno-override-init" To fix this, only enable the compiler option when it is actually supported by the compiler. Fixes: ca52953f5f24 ("fs/proc/task_mmu.c: suppress compilation warnings with W=1") Signed-off-by: Geert Uytterhoeven <[email protected]> Acked-by: Valdis Kletnieks <[email protected]> Cc: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-03dm raid: constructor fails on non-zero incompat_featuresHeinz Mauelshagen1-0/+1
When lvm2 userspace requests a RaidLV repair, it sets the rebuild constructor flag on the new replacement DataLVs but does not clear the respective MetaLVs. Hence the superblock that is loaded from such new MetaLVs may have a non-zero incompat_features member and the constructor will fail with false-positive on incompat_features. Solve by initializing the incompat_features member properly. Signed-off-by: Heinz Mauelshagen <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
2016-08-03dm raid: fix processing of max_recovery_rate constructor flagHeinz Mauelshagen1-1/+1
__CTR_FLAG_MIN_RECOVERY_RATE was used instead of __CTR_FLAG_MAX_RECOVERY_RATE thus causing max_recovery_rate to be rejected in case min_recovery_rate was already set. Signed-off-by: Heinz Mauelshagen <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
2016-08-03ALSA: hda: Fix krealloc() with __GFP_ZERO usageTakashi Iwai1-1/+3
krealloc() doesn't work always properly with __GFP_ZERO flag as expected. For clearing the reallocated area, we need to clear explicitly instead. Reported-by: Joe Perches <[email protected]> Cc: <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
2016-08-03ALSA: hda: add AMD Bonaire AZ PCI ID with proper driver capsMaruthi Srinivas Bayyavarapu1-0/+2
This commit fixes garbled audio on Bonaire HDMI Signed-off-by: Maruthi Bayyavarapu <[email protected]> Reviewed-by: Alex Deucher <[email protected]> Cc: <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
2016-08-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds52-95/+195
Pull networking fixes from David Miller: 1) Fix several cases of missing of_node_put() calls in various networking drivers. From Peter Chen. 2) Don't try to remove unconfigured VLANs in qed driver, from Yuval Mintz. 3) Unbalanced locking in TIPC error handling, from Wei Yongjun. 4) Fix lockups in CPDMA driver, from Grygorii Strashko. 5) More MACSEC refcount et al fixes, from Sabrina Dubroca. 6) Fix MAC address setting in r8169 during runtime suspend, from Chun-Hao Lin. 7) Various printf format specifier fixes, from Heinrich Schuchardt. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (59 commits) qed: Fail driver load in 100g MSI mode. ethernet: ti: davinci_emac: add missing of_node_put after calling of_parse_phandle ethernet: stmicro: stmmac: add missing of_node_put after calling of_parse_phandle ethernet: stmicro: stmmac: dwmac-socfpga: add missing of_node_put after calling of_parse_phandle ethernet: renesas: sh_eth: add missing of_node_put after calling of_parse_phandle ethernet: renesas: ravb_main: add missing of_node_put after calling of_parse_phandle ethernet: marvell: pxa168_eth: add missing of_node_put after calling of_parse_phandle ethernet: marvell: mvpp2: add missing of_node_put after calling of_parse_phandle ethernet: marvell: mvneta: add missing of_node_put after calling of_parse_phandle ethernet: hisilicon: hns: hns_dsaf_main: add missing of_node_put after calling of_parse_phandle ethernet: hisilicon: hns: hns_dsaf_mac: add missing of_node_put after calling of_parse_phandle ethernet: cavium: octeon: add missing of_node_put after calling of_parse_phandle ethernet: aurora: nb8800: add missing of_node_put after calling of_parse_phandle ethernet: arc: emac_main: add missing of_node_put after calling of_parse_phandle ethernet: apm: xgene: add missing of_node_put after calling of_parse_phandle ethernet: altera: add missing of_node_put 8139too: fix system hang when there is a tx timeout event. qed: Fix error return code in qed_resc_alloc() net: qlcnic: avoid superfluous assignement dsa: b53: remove redundant if ...
2016-08-03Input: add driver for SiS 9200 family I2C touchscreen controllersMika Penttilä5-0/+460
This is a driver for SiS 9200 family touchscreen controllers using I2C bus. Signed-off-by: Mika Penttilä <[email protected]> Acked-by: Tammy Tseng <[email protected]> Acked-by: Yuger Yu <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2016-08-02Input: ili210x - fix permissions on "calibrate" attributeDmitry Torokhov1-1/+1
"calibrate" attribute does not provide "show" methods and thus we should not mark it as readable. Signed-off-by: Dmitry Torokhov <[email protected]>
2016-08-02Input: elan_i2c - properly wake up touchpad on ASUS laptopsKT Liao1-16/+63
Some ASUS laptops were shipped with touchpads that require to be woken up first, before trying to switch them into absolute reporting mode, otherwise touchpad would fail to work while flooding the logs with: elan_i2c i2c-ELAN1000:00: invalid report id data (1) Among affected devices are Asus E202SA, N552VW, X456UF, UX305CA, and others. We detect such devices by checking the IC type and product ID numbers and adjusting order of operations accordingly. Signed-off-by: KT Liao <[email protected]> Reported-by: Chris Chiu <[email protected]> Reported-by: Vlad Glagolev <[email protected]> Tested-by: Vlad Glagolev <[email protected]> Cc: [email protected] Signed-off-by: Dmitry Torokhov <[email protected]>
2016-08-02Input: add driver for Silead touchscreensRobert Dolca4-0/+617
This driver adds support for Silead touchscreens. It has been tested with GSL1680 and GSL3680 touch panels. It supports ACPI and device tree enumeration. Screen resolution, the maximum number of fingers supported and firmware name are configurable. Signed-off-by: Robert Dolca <[email protected]> Signed-off-by: Daniel Jansen <[email protected]> Signed-off-by: Hans de Goede <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2016-08-02Input: elantech - fix debug dump of the current packetBenjamin Tissoires1-6/+2
The use of mixed psmouse_printk() and printk creates 2 lines in the log, while the use of %*ph solves everything. Signed-off-by: Benjamin Tissoires <[email protected]> Signed-off-by: Dmitry Torokhov <[email protected]>
2016-08-03powerpc/32: Fix early access to cpu_spec relocationBenjamin Herrenschmidt1-1/+1
Commit 9402c6846131 ("powerpc: Factor do_feature_fixup calls") introduced a subtle bug on 32-bit. When reading the cpu spec from the global, we not only need to do a pointer relocation on the global address but also on the pointer we read from it. This fixes crashes reported on MPC5200 based machines. Fixes: 9402c6846131 ("powerpc: Factor do_feature_fixup calls") Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-02IB/hfi1: Add cache evict LRU listDean Luick1-10/+19
The original code used a LRU list to evict nodes which were least recently used. For correctness the evict code was moved under the handler->lock, now add back the LRU list. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix memory leak during unexpected shutdownIra Weiny1-13/+31
During an unexpected shutdown, references to tid_rb_node were NULL'ed out without properly being released. Fix this by calling clear_tid_node in the mmu notifier remove callback rather than after these callbacks are called. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unneeded mm argument in remove functionDean Luick4-15/+10
The reworked mmu_rb interface allows the unused mm argument to be removed. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Consistently call ops->remove outside spinlockDean Luick4-23/+84
The ops->remove() callback was called by hfi1_mmu_unregister() with a NULL mm argument while holding a spinlock. In the case of sdma_rb_remove() this caused it to pass current->mm to hfi1_release_user_pages() This had 2 problems. First this would attempt to acquire the mmap_sem under a spin lock. Second the use of current->mm is not always guaranteed to be the proper mm when the fd is being closed. Rather than depend on this implicit behavior we move all calls to ops->remove outside of the spinlock. This also allows the correct mm to be used in the remove callback without fear of deadlock. Because the MMU notifier is not guaranteed to hold mm->mmap_sem, but usually does, we must delay all remove callbacks until out of the notifier, when the callbacks can take the mmap_sem if they need to. Code comments were added to clarify what the expectations are for the users of the mmu rb tree. Suggested-by: Jim Foraker <[email protected]> Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Use evict mmu rb operationDean Luick2-73/+47
Use the new cache evict operation in the SDMA code. This allows the cache to properly coordinate evicts and removes, preventing any race. With this change, the separate list, lock, and race flag are not needed. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Add evict operation to the mmu rb handlerDean Luick2-0/+38
Allow users to clear nodes from the rb tree based on their evict callback. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix TID caching actionsDean Luick2-9/+11
Per file descriptor TID caching actions depend on a global that can change midway through the lifetime of that file descriptor. Make the use of caching consistent for the life of the file descriptor by using the presence of the cache handler to decide when to use the cache functions. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Make the cache handler own its rb tree rootDean Luick6-125/+81
The objects which use cache handling should reference their own handler object not the internal data structure it uses to track the nodes. Have the "users" of the mmu notifier code pass opaque objects which can then be properly used in the mmu callbacks depending on the owners needs. This patch has the additional benefit that operations no longer require a look up in a list to find the handlers. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Make use of mm consistentIra Weiny8-31/+50
The hfi1 driver registers a mmu_notifier callback when /dev/hfi1_* is opened, and unregisters it when the device is closed. The driver incorrectly assumes that the close will always happen from the same context as the open. In particular, closes due to SIGKILL or OOM killer activity may happen from a different context. In these cases, the wrong mm is passed to mmu_notifier_unregister(), which causes improper reference counting for the victim mm, and eventual memory corruption. Preserve the mm for all open file descriptors and use this mm rather than current->mm for memory operations for the lifetime of that fd. Note: this patch leaves 1 use of current->mm in place. This use is removed in a follow on patch because other functional changes were required prior to that use being removed. If registration fails, there is no reason to keep the handler object around. Free the handler object rather than add it to the list to prevent any mmu_notifier operations, including unregister, when registration fails. Suggested-by: Jim Foraker <[email protected]> Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix user SDMA racy user request claimDean Luick2-13/+20
The user SDMA in-use claim bit is in the structure that gets zeroed out once the claim is made. Move the request in-use flag into its own bit array and use that for atomic claims. This cleans up the claim code and removes any race possibility. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix error condition that needs to clean upDean Luick1-1/+2
If input validation fails, properly free the request before returning. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Release node on insert failureDean Luick1-0/+1
If unable to insert node into the RB tree cache, node will be freed before returning from the function. Null out iovec's pointer to node so iovec does not try to free it later. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Validate SDMA user iovector countDean Luick1-2/+22
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Validate SDMA user request indexDean Luick1-0/+8
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Use the same capability state for all shared contextsDean Luick4-21/+12
Save the current capability state at user context creation time. Report this saved value for all shared contexts. Also get rid of unnecessary hfi1_get_base_kinfo function. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Prevent null pointer dereferenceIra Weiny1-1/+1
If a context has not been assigned or assignment failed, pq may be NULL. Move the unregister within the protection of the null check. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Rename TID mmu_rb_* functionsDean Luick1-12/+12
Clarify the names of the TID mmu functions. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister()Dean Luick1-9/+6
Checking if the rb tree is empty is redundant with the while loop which is emptying the rb tree. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Restructure hfi1_file_openIra Weiny1-4/+10
Rearrange the file open call in prep for new changes. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Make iovec loop index easy to understandDean Luick1-3/+3
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Use "false" not 0Ira Weiny1-1/+1
For bool parameters "false" should be used Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused sub-context parameterIra Weiny1-5/+4
subctxt is not used, just remove it. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Consolidate __mmu_rb_remove and hfi1_mmu_rb_removeIra Weiny1-17/+9
__mmu_rb_remove was called in only 1 place which was a very simple call site. Combine this function into its caller. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Always expect ops functionsDean Luick1-14/+6
Remove, insert, and invalidate are always provided. No need to test. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Add parameter names to callback declarationsIra Weiny1-5/+6
This makes it more clear what these functions are operating on. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Add parameter names to function declarationsIra Weiny1-3/+5
Parameter names to function declarations make it more clear what those parameters do. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused function hfi1_mmu_rb_searchDean Luick2-19/+0
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused uctxt->subpid and uctxt->pidDean Luick2-7/+0
These are no longer needed. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
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