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Helge Deller d96b51ec14 parisc: fix irq stack on UP and SMP 
The logic to detect if the irq stack was already in use with
raw_spin_trylock() is wrong, because it will generate a "trylock failure
on UP" error message with CONFIG_SMP=n and CONFIG_DEBUG_SPINLOCK=y.

arch_spin_trylock() can't be used either since in the CONFIG_SMP=n case
no atomic protection is given and we are reentrant here. A mutex didn't
worked either and brings more overhead by turning off interrupts.

So, let's use the fastest path for parisc which is the ldcw instruction.

Counting how often the irq stack was used is pretty useless, so just
drop this piece of code.

Signed-off-by: Helge Deller <deller@gmx.de>
 		2013-05-24 23:29:01 +02:00
..
.gitignore parisc: add arch/parisc/kernel/.gitignore 2008-10-10 16:32:28 +00:00
Makefile parisc: Fix init_task fallout 2012-05-07 11:38:46 +02:00
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: remove the second argument of kmap_atomic 2013-05-06 22:19:00 +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 parisc: make interrupt and interruption stack allocation reentrant 2013-05-24 22:35:36 +02:00
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 parisc: add rp5470 entry to machine database 2013-05-24 22:30:20 +02:00
head.S [PARISC] only make executable areas executable 2011-04-15 12:55:18 -05:00
hpmc.S parisc: fix partly 16/64k PAGE_SIZE boot 2013-05-06 23:08:32 +02:00
inventory.c parisc: fix possible memory leak in pat_query_module() 2013-02-20 22:47:11 +01:00
irq.c parisc: fix irq stack on UP and SMP 2013-05-24 23:29:01 +02:00
module.c modules: don't hand 0 to vmalloc. 2012-12-14 13:06:43 +10:30
pa7300lc.c
…
pacache.S parisc: use PAGE_SHIFT instead of hardcoded value 12 in pacache.S 2013-05-24 22:30:28 +02:00
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 parisc: single_open() leaks 2013-05-05 00:10:41 -04:00
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 parisc: Use generic idle loop 2013-04-08 17:39:27 +02:00
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: fix partly 16/64k PAGE_SIZE boot 2013-05-06 23:08:32 +02:00
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: tlb flush counting fix for SMP and UP 2013-05-07 23:44:04 +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 unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
syscall.S parisc: document the parisc gateway page 2013-05-06 23:09:10 +02:00
syscall_table.S get rid of union semop in sys_semctl(2) arguments 2013-03-05 15:14:16 -05:00
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 parisc: show number of FPE and unaligned access handler calls in /proc/interrupts 2013-05-24 22:35:26 +02:00
unaligned.c parisc: show number of FPE and unaligned access handler calls in /proc/interrupts 2013-05-24 22:35:26 +02:00
unwind.c parisc: unwind - optimise linked-list searches for modules 2010-10-21 21:12:19 -04:00
vmlinux.lds.S parisc: add kernel stack overflow check 2013-05-07 21:34:07 +02:00