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linux/arch/parisc/kernel
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John David Anglin bda079d336 parisc: use spin_lock_irqsave/spin_unlock_irqrestore for PTE updates 
User applications running on SMP kernels have long suffered from instability
and random segmentation faults.  This patch improves the situation although
there is more work to be done.

One of the problems is the various routines in pgtable.h that update page table
entries use different locking mechanisms, or no lock at all (set_pte_at).  This
change modifies the routines to all use the same lock pa_dbit_lock.  This lock
is used for dirty bit updates in the interruption code. The patch also purges
the TLB entries associated with the PTE to ensure that inconsistent values are
not used after the page table entry is updated.  The UP and SMP code are now
identical.

The change also includes a minor update to the purge_tlb_entries function in
cache.c to improve its efficiency.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
2013-04-25 22:37:00 +02:00
..
.gitignore parisc: add arch/parisc/kernel/.gitignore 2008-10-10 16:32:28 +00:00
asm-offsets.c parisc: Use of align_frame provides stack frame. 2010-05-30 05:38:27 -04:00
binfmt_elf32.c parisc: fix redefinition of SET_PERSONALITY 2013-03-02 20:15:28 +01:00
cache.c parisc: use spin_lock_irqsave/spin_unlock_irqrestore for PTE updates 2013-04-25 22:37:00 +02:00
drivers.c parisc: Add export.h to files needing EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:00 -04:00
entry.S Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-02-23 18:50:11 -08:00
firmware.c Disintegrate asm/system.h for PA-RISC 2012-03-28 18:30:02 +01:00
ftrace.c sched_clock: Add local_clock() API and improve documentation 2010-06-09 10:34:49 +02:00
hardware.c ARCH: drivers remove __dev* attributes. 2013-01-03 15:57:13 -08:00
head.S [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
hpmc.S parisc: export length of os_hpmc vector 2009-01-05 19:18:27 +00:00
inventory.c parisc: fix possible memory leak in pat_query_module() 2013-02-20 22:47:11 +01:00
irq.c parisc: remove IRQF_DISABLED 2013-02-20 22:50:26 +01:00
Makefile parisc: Fix init_task fallout 2012-05-07 11:38:46 +02:00
module.c modules: don't hand 0 to vmalloc. 2012-12-14 13:06:43 +10:30
pa7300lc.c
pacache.S parisc: fixes and cleanups in page cache flushing (2/4) 2013-02-20 22:49:29 +01:00
parisc_ksyms.c parisc: Provide __ucmpdi2 to resolve undefined references in 32 bit builds. 2013-04-25 22:36:15 +02:00
pci-dma.c parisc: Add export.h to files needing EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:00 -04:00
pci.c parisc/PCI: factor out pcibios_setup() 2012-07-05 15:09:13 -06:00
pdc_chassis.c
pdc_cons.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
perf.c parisc: remove big kernel lock 2010-10-16 22:43:08 +02:00
perf_asm.S Revert "parisc: fix trivial section name warnings" 2008-06-13 10:49:45 -04:00
perf_images.h
process.c flagday: don't pass regs to copy_thread() 2012-11-28 23:43:42 -05:00
processor.c parisc: processor.c, fix bloated stack frame 2009-07-03 03:34:11 +00:00
ptrace.c parisc: improve ptrace support for gdb single-step 2013-01-07 23:06:27 +01:00
real2.S parisc: move pdc_result to real2.S 2008-10-10 16:32:28 +00:00
setup.c parisc: Add export.h to files needing EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:31:00 -04:00
signal.c parisc: remove unused variable 'compat_val' 2013-03-02 19:56:18 +01:00
signal32.c parisc: fix error return codes for rt_sigaction and rt_sigprocmask 2013-02-20 22:57:02 +01:00
signal32.h parisc: switch to generic compat rt_sigaction() 2013-02-03 18:16:07 -05:00
smp.c parisc: Smp: remove call to ipi_call_lock()/ipi_call_unlock() 2012-06-05 17:27:12 +02:00
stacktrace.c parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT 2009-03-31 02:51:34 +00:00
sys32.h parisc: switch to generic compat rt_sigaction() 2013-02-03 18:16:07 -05:00
sys_parisc.c mm: use vm_unmapped_area() on parisc architecture 2013-02-27 19:10:09 -08:00
sys_parisc32.c switch lseek to COMPAT_SYSCALL_DEFINE 2013-02-24 10:52:26 -05:00
syscall.S parisc: fix ptrace breakage 2013-02-20 22:51:11 +01:00
syscall_table.S Merge branch 'fixes-for-3.9-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2013-03-03 12:57:38 -08:00
time.c parisc: move definition of PAGE0 to asm/page.h 2012-05-10 15:12:08 -07:00
topology.c parisc: Replace NR_CPUS in parisc code 2009-01-05 19:09:02 +00:00
traps.c taint: add explicit flag to show whether lock dep is still OK. 2013-01-21 17:17:57 +10:30
unaligned.c arch/parisc: Removing undead ifdef CONFIG_PA20 2010-10-21 21:13:29 -04:00
unwind.c parisc: unwind - optimise linked-list searches for modules 2010-10-21 21:12:19 -04:00
vmlinux.lds.S [PARISC] fix boot failure on 32-bit systems caused by branch stubs placed before .text 2012-05-25 10:52:17 +01:00