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| author | Helge Deller <deller@gmx.de> | 2013-05-24 21:27:35 (GMT) |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2013-05-24 21:29:01 (GMT) |
| commit | d96b51ec14650b490ab98e738bcc02309396e5bc (patch) | |
| tree | bcc82f90634f689e629ed692f2fa6f1654d3cbbf /arch/parisc/include/asm/hardirq.h | |
| parent | 2c2d32bed1a1bb6121494965b31badb280f04b0e (diff) | |
| download | linux-d96b51ec14650b490ab98e738bcc02309396e5bc.tar.xz | |
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>
Diffstat (limited to 'arch/parisc/include/asm/hardirq.h')
| -rw-r--r-- | arch/parisc/include/asm/hardirq.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/parisc/include/asm/hardirq.h b/arch/parisc/include/asm/hardirq.h index 4c6dd8d..241c345 100644 --- a/arch/parisc/include/asm/hardirq.h +++ b/arch/parisc/include/asm/hardirq.h @@ -17,13 +17,8 @@ typedef struct { unsigned int __softirq_pending; -#ifdef CONFIG_DEBUG_STACKOVERFLOW unsigned int kernel_stack_usage; -#ifdef CONFIG_IRQSTACKS unsigned int irq_stack_usage; - unsigned int irq_stack_counter; -#endif -#endif #ifdef CONFIG_SMP unsigned int irq_resched_count; unsigned int irq_call_count; |