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| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:42:42 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:01:12 -0800 |
| commit | 2d52ede9876ba566b583f255fdc43800eea81baa (patch) | |
| tree | 07f405b7807ac54a9e091ea6054281d2c290e6c6 | |
| parent | 7eb903f4a5c35c8310f0aa7b0e94aae0b826d837 (diff) | |
| download | linux-3.10-2d52ede9876ba566b583f255fdc43800eea81baa.tar.gz linux-3.10-2d52ede9876ba566b583f255fdc43800eea81baa.tar.bz2 linux-3.10-2d52ede9876ba566b583f255fdc43800eea81baa.zip | |
[PATCH] x86_64: Remove enable/disable_hlt
Was only used by the floppy driver to work around some ancient
hardware bug that should never occur on any 64bit system.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/kernel/process.c | 39 | ||||
| -rw-r--r-- | include/asm-x86_64/system.h | 7 |
2 files changed, 9 insertions, 37 deletions
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c index 3060ed97b75..c9df991150b 100644 --- a/arch/x86_64/kernel/process.c +++ b/arch/x86_64/kernel/process.c @@ -55,8 +55,6 @@ asmlinkage extern void ret_from_fork(void); unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED; -static atomic_t hlt_counter = ATOMIC_INIT(0); - unsigned long boot_option_idle_override = 0; EXPORT_SYMBOL(boot_option_idle_override); @@ -66,20 +64,6 @@ EXPORT_SYMBOL(boot_option_idle_override); void (*pm_idle)(void); static DEFINE_PER_CPU(unsigned int, cpu_idle_state); -void disable_hlt(void) -{ - atomic_inc(&hlt_counter); -} - -EXPORT_SYMBOL(disable_hlt); - -void enable_hlt(void) -{ - atomic_dec(&hlt_counter); -} - -EXPORT_SYMBOL(enable_hlt); - /* * We use this if we don't have any better * idle routine.. @@ -88,21 +72,16 @@ void default_idle(void) { local_irq_enable(); - if (!atomic_read(&hlt_counter)) { - clear_thread_flag(TIF_POLLING_NRFLAG); - smp_mb__after_clear_bit(); - while (!need_resched()) { - local_irq_disable(); - if (!need_resched()) - safe_halt(); - else - local_irq_enable(); - } - set_thread_flag(TIF_POLLING_NRFLAG); - } else { - while (!need_resched()) - cpu_relax(); + clear_thread_flag(TIF_POLLING_NRFLAG); + smp_mb__after_clear_bit(); + while (!need_resched()) { + local_irq_disable(); + if (!need_resched()) + safe_halt(); + else + local_irq_enable(); } + set_thread_flag(TIF_POLLING_NRFLAG); } /* diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h index b34cc2ee222..1200ea2ea12 100644 --- a/include/asm-x86_64/system.h +++ b/include/asm-x86_64/system.h @@ -330,13 +330,6 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, void cpu_idle_wait(void); -/* - * disable hlt during certain critical i/o operations - */ -#define HAVE_DISABLE_HLT -void disable_hlt(void); -void enable_hlt(void); - extern unsigned long arch_align_stack(unsigned long sp); #endif |