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When dereferencing the memory address contained in a register and
modifying the value at that memory address, the register should not be
listed in the inline asm outputs. The value at the memory address is an
output (which is taken care of with the "memory" clobber), not the register.
Signed-off-by: Matt Fleming <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This corrects a deadlock encountered on ap325 in the cases where the
mutex is contended and the slow-path needs to be fallen back upon.
Signed-off-by: Takashi YOSHII <[email protected]>
Signed-off-by: Kuninori Morimoto <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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The T-bit manipulation for syscall error checking had the side effect of
spuriously returning ERESTART* errno values over EINTR. So, we simplify
the error checking a bit and leave the T-bit alone.
Reported-by: Kaz Kojima <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This patch updates the SuperH gpio code to make use of gpiolib. The
gpiolib callbacks get() and set() are lockless, but we use our own
spinlock for the other operations to make sure hardware register
bitfield accesses stay atomic.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This patch optimizes the gpio data register handling for gpio_set_value().
Instead of using the good old spinlock-plus-read-modify-write strategy
we now use a shadow register and atomic operations.
This improves the bitbanging mmc performance on Migo-R from 26 Kbytes/s
to 40 Kbytes/s.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This patch modifies the table based SuperH gpio implementation to
make use of direct table lookups. With this change the functions
gpio_get_value() and gpio_set_value() are O(1).
Tested on Migo-R using bitbanging mmc. Performance is improved from
11 KBytes/s to 26 Kbytes/s.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Bring sh in line with all the other ports. Not sure how sh missed this
change as all the other arches were being updated ...
Signed-off-by: Mike Frysinger <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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* 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (44 commits)
[CVE-2009-0029] s390 specific system call wrappers
[CVE-2009-0029] System call wrappers part 33
[CVE-2009-0029] System call wrappers part 32
[CVE-2009-0029] System call wrappers part 31
[CVE-2009-0029] System call wrappers part 30
[CVE-2009-0029] System call wrappers part 29
[CVE-2009-0029] System call wrappers part 28
[CVE-2009-0029] System call wrappers part 27
[CVE-2009-0029] System call wrappers part 26
[CVE-2009-0029] System call wrappers part 25
[CVE-2009-0029] System call wrappers part 24
[CVE-2009-0029] System call wrappers part 23
[CVE-2009-0029] System call wrappers part 22
[CVE-2009-0029] System call wrappers part 21
[CVE-2009-0029] System call wrappers part 20
[CVE-2009-0029] System call wrappers part 19
[CVE-2009-0029] System call wrappers part 18
[CVE-2009-0029] System call wrappers part 17
[CVE-2009-0029] System call wrappers part 16
[CVE-2009-0029] System call wrappers part 15
...
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Add swab.h to kbuild.asm and remove the individual entries from
each arch, mark as unifdef as some arches have some kernel-only
bits inside.
Signed-off-by: Harvey Harrison <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Remove __attribute__((weak)) from common code sys_pipe implemantation.
IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations
with the same name. Just rename them.
For sys_pipe2 there is no architecture specific implementation.
Cc: Richard Henderson <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: Tony Luck <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
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Make VMAs per mm_struct as for MMU-mode linux. This solves two problems:
(1) In SYSV SHM where nattch for a segment does not reflect the number of
shmat's (and forks) done.
(2) In mmap() where the VMA's vm_mm is set to point to the parent mm by an
exec'ing process when VM_EXECUTABLE is specified, regardless of the fact
that a VMA might be shared and already have its vm_mm assigned to another
process or a dead process.
A new struct (vm_region) is introduced to track a mapped region and to remember
the circumstances under which it may be shared and the vm_list_struct structure
is discarded as it's no longer required.
This patch makes the following additional changes:
(1) Regions are now allocated with alloc_pages() rather than kmalloc() and
with no recourse to __GFP_COMP, so the pages are not composite. Instead,
each page has a reference on it held by the region. Anything else that is
interested in such a page will have to get a reference on it to retain it.
When the pages are released due to unmapping, each page is passed to
put_page() and will be freed when the page usage count reaches zero.
(2) Excess pages are trimmed after an allocation as the allocation must be
made as a power-of-2 quantity of pages.
(3) VMAs are added to the parent MM's R/B tree and mmap lists. As an MM may
end up with overlapping VMAs within the tree, the VMA struct address is
appended to the sort key.
(4) Non-anonymous VMAs are now added to the backing inode's prio list.
(5) Holes may be punched in anonymous VMAs with munmap(), releasing parts of
the backing region. The VMA and region structs will be split if
necessary.
(6) sys_shmdt() only releases one attachment to a SYSV IPC shared memory
segment instead of all the attachments at that addresss. Multiple
shmat()'s return the same address under NOMMU-mode instead of different
virtual addresses as under MMU-mode.
(7) Core dumping for ELF-FDPIC requires fewer exceptions for NOMMU-mode.
(8) /proc/maps is now the global list of mapped regions, and may list bits
that aren't actually mapped anywhere.
(9) /proc/meminfo gains a line (tagged "MmapCopy") that indicates the amount
of RAM currently allocated by mmap to hold mappable regions that can't be
mapped directly. These are copies of the backing device or file if not
anonymous.
These changes make NOMMU mode more similar to MMU mode. The downside is that
NOMMU mode requires some extra memory to track things over NOMMU without this
patch (VMAs are no longer shared, and there are now region structs).
Signed-off-by: David Howells <[email protected]>
Tested-by: Mike Frysinger <[email protected]>
Acked-by: Paul Mundt <[email protected]>
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Signed-off-by: Harvey Harrison <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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The atomic_t type cannot currently be used in some header files because it
would create an include loop with asm/atomic.h. Move the type definition
to linux/types.h to break the loop.
Signed-off-by: Matthew Wilcox <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask
Conflicts:
arch/x86/kernel/io_apic.c
kernel/rcuclassic.c
kernel/sched.c
kernel/time/tick-sched.c
Signed-off-by: Mike Travis <[email protected]>
[ [email protected]: backmerged typo fix for io_apic.c ]
Signed-off-by: Ingo Molnar <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
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* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (85 commits)
[S390] provide documentation for hvc_iucv kernel parameter.
[S390] convert ctcm printks to dev_xxx and pr_xxx macros.
[S390] convert zfcp printks to pr_xxx macros.
[S390] convert vmlogrdr printks to pr_xxx macros.
[S390] convert zfcp dumper printks to pr_xxx macros.
[S390] convert cpu related printks to pr_xxx macros.
[S390] convert qeth printks to dev_xxx and pr_xxx macros.
[S390] convert sclp printks to pr_xxx macros.
[S390] convert iucv printks to dev_xxx and pr_xxx macros.
[S390] convert ap_bus printks to pr_xxx macros.
[S390] convert dcssblk and extmem printks messages to pr_xxx macros.
[S390] convert monwriter printks to pr_xxx macros.
[S390] convert s390 debug feature printks to pr_xxx macros.
[S390] convert monreader printks to pr_xxx macros.
[S390] convert appldata printks to pr_xxx macros.
[S390] convert setup printks to pr_xxx macros.
[S390] convert hypfs printks to pr_xxx macros.
[S390] convert time printks to pr_xxx macros.
[S390] convert cpacf printks to pr_xxx macros.
[S390] convert cio printks to pr_xxx macros.
...
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{node,pcibus}_to_cpumask
Impact: New APIs
The old node_to_cpumask/node_to_pcibus returned a cpumask_t: these
return a pointer to a struct cpumask. Part of removing cpumasks from
the stack.
Signed-off-by: Rusty Russell <[email protected]>
Cc: Paul Mundt <[email protected]>
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arch_setup_additional_pages currently gets two arguments, the binary
format descripton and an indication if the process uses an executable
stack or not. The second argument is not used by anybody, it could
be removed without replacement.
What actually does make sense is to pass an indication if the process
uses the elf interpreter or not. The glibc code will not use anything
from the vdso if the process does not use the dynamic linker, so for
statically linked binaries the architecture backend can choose not
to map the vdso.
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
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We don't really want this enabled by default, but it is still quite
useful for debugging. So, make it conditional and leave it off by
default.
Signed-off-by: Paul Mundt <[email protected]>
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While no one should be including this file multiple times, flag it
inline anyways just in case.
Signed-off-by: Paul Mundt <[email protected]>
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Now that the rest of the boards that were using cf-enabler "generically"
have switched to setting up their mappings on their own, only the mach-se
boards were left using it. All of the cf-enabler using mach-se boards
use a special initialization of the MRSHPC windows rather than going
through the special PTE as other SH-4 platforms do. This consolidates
the MRSHPC setup logic, hooks it up on the boards that care, and gets rid
of any and all remaining references to cf-enabler.
This has been long overdue, as cf-enabler has been the bane of
arch/sh/kernel for the last 7 years. Good riddance.
Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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Nothing is using this any more, so get rid of it before anyone gets the
bright idea to start using it again.
Signed-off-by: Paul Mundt <[email protected]>
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With the reworked kgdb support, we always detach and reinitialize the
stub. This was mostly a feature for handoffs between sh-ipl+g and the
kgdb stub, but virtually no sh-ipl+g versions ever had this working
right in the first place.
Given that the sh-ipl+g stubs in general use today don't even support
the GDB stub, and we have already killed off the special casing in the
sh-sci serial driver, kill off this now unused symbol too.
Signed-off-by: Paul Mundt <[email protected]>
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Adopted from the uClibc optimized string versions.
Signed-off-by: Paul Mundt <[email protected]>
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This migrates from the old bitrotted kgdb stub implementation and moves
to the generic stub. In the process support for SH-2/SH-2A is also added,
which the old stub never provided.
Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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Plugs in general and FPU regsets.
Signed-off-by: Paul Mundt <[email protected]>
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This provides the asm/syscall.h implementation for sh64 parts.
Signed-off-by: Paul Mundt <[email protected]>
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Residual copy-and-paste damage, fix it up.
Signed-off-by: Paul Mundt <[email protected]>
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This ought to be unsigned long, rather than defaulting to int.
Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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This fixes up the __mutex_fastpath_xxx() routines to match the semantics
noted in the comment. Previously these were looping rather than doing a
single-pass, which is counter-intuitive, as the slow path takes care of
the looping for us in the event of contention.
Signed-off-by: Paul Mundt <[email protected]>
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Move the not-so-generic pm code from arch/sh/kernel/pm.c to the
platform directory together with the rest of the hp6xx pm code.
This is done to let non-hp6xx platforms enable CONFIG_PM.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Remove out-of-date se7343 ioport code including some old support
for unknown-ne2000-pcmcia-card, cf-over-pcmcia and a mysterical
smc91x that once must have been on a special daughterboard.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Add 8250 platform data to setup the ST16C2550C chip on se7343.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This patch adds support for the SH-2A FPU based SH7201 processor subtype.
Signed-off-by: Peter Griffin <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Needed for dynamic ftrace API changes.
Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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This implements a simple show_code() that is in turn plugged in to
show_regs() to provide minimal code dumping at the end of the trace.
Built on top of a simple instruction disassembler derived from the
binutils opcode table.
Signed-off-by: Paul Mundt <[email protected]>
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This adds support for unaligned loads on SH-4A, using the SH-4A's
neutered movua.l instruction. As movua.l is r0-inspired, stores are
still handled through the packed struct.
Based on asm-generic/unaligned.h by Harvey Harrison.
Signed-off-by: Paul Mundt <[email protected]>
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This patch adds a pass-through case when ioremapping P4 addresses.
Addresses passed to ioremap() should be physical addresses, so the
best option is usually to convert the virtual address to a physical
address before calling ioremap. This will give you a virtual address
in P2 which matches the physical address and this works well for
most internal hardware blocks on the SuperH architecture.
However, some hardware blocks must be accessed through P4. Converting
the P4 address to a physical and then back to a P2 does not work. One
example of this is the sh7722 TMU block, it must be accessed through P4.
Without this patch P4 addresses will be mapped using PTEs which
requires the page allocator to be up and running.
Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Add fast mutex path implementation for the SH4A architecture
Signed-off-by: Michael Trimarchi <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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I'm using these constants in support of an in-house development board,
and thought they may be useful to other users of SH7709.
Signed-off-by: Steve Glendinning <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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This ties in the new SH-2A 32-bit non-atomic bitops.
Signed-off-by: Paul Mundt <[email protected]>
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Signed-off-by: Paul Mundt <[email protected]>
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First cut at dynamic ftrace support.
Signed-off-by: Matt Fleming <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
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Conflicts:
arch/x86/kernel/io_apic.c
kernel/sched.c
kernel/sched_stats.h
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