diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2008-03-07 21:55:58 -0500 |
|---|---|---|
| committer | Matthew Wilcox <willy@linux.intel.com> | 2008-04-17 10:42:34 -0400 |
| commit | 64ac24e738823161693bf791f87adc802cf529ff (patch) | |
| tree | 19c0b0cf314d4394ca580c05b86cdf874ce0a167 /arch/x86 | |
| parent | e48b3deee475134585eed03e7afebe4bf9e0dba9 (diff) | |
| download | kernel_goldelico_gta04-64ac24e738823161693bf791f87adc802cf529ff.zip kernel_goldelico_gta04-64ac24e738823161693bf791f87adc802cf529ff.tar.gz kernel_goldelico_gta04-64ac24e738823161693bf791f87adc802cf529ff.tar.bz2 | |
Generic semaphore implementation
Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility. Thanks to Peter Zijlstra for fixing the lockdep
warning. Thanks to Harvey Harrison for pointing out that the
unlikely() was unnecessary.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/i386_ksyms_32.c | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/x8664_ksyms_64.c | 6 | ||||
| -rw-r--r-- | arch/x86/lib/semaphore_32.S | 83 | ||||
| -rw-r--r-- | arch/x86/lib/thunk_64.S | 5 |
5 files changed, 0 insertions, 102 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6c70fed..e4b3886 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -53,9 +53,6 @@ config STACKTRACE_SUPPORT config HAVE_LATENCYTOP_SUPPORT def_bool y -config SEMAPHORE_SLEEPERS - def_bool y - config FAST_CMPXCHG_LOCAL bool default y diff --git a/arch/x86/kernel/i386_ksyms_32.c b/arch/x86/kernel/i386_ksyms_32.c index 0616278..deb4378 100644 --- a/arch/x86/kernel/i386_ksyms_32.c +++ b/arch/x86/kernel/i386_ksyms_32.c @@ -1,13 +1,8 @@ #include <linux/module.h> -#include <asm/semaphore.h> #include <asm/checksum.h> #include <asm/desc.h> #include <asm/pgtable.h> -EXPORT_SYMBOL(__down_failed); -EXPORT_SYMBOL(__down_failed_interruptible); -EXPORT_SYMBOL(__down_failed_trylock); -EXPORT_SYMBOL(__up_wakeup); /* Networking helper routines. */ EXPORT_SYMBOL(csum_partial_copy_generic); diff --git a/arch/x86/kernel/x8664_ksyms_64.c b/arch/x86/kernel/x8664_ksyms_64.c index a66e9c1..95a993e 100644 --- a/arch/x86/kernel/x8664_ksyms_64.c +++ b/arch/x86/kernel/x8664_ksyms_64.c @@ -4,7 +4,6 @@ #include <linux/module.h> #include <linux/smp.h> -#include <asm/semaphore.h> #include <asm/processor.h> #include <asm/uaccess.h> #include <asm/pgtable.h> @@ -12,11 +11,6 @@ EXPORT_SYMBOL(kernel_thread); -EXPORT_SYMBOL(__down_failed); -EXPORT_SYMBOL(__down_failed_interruptible); -EXPORT_SYMBOL(__down_failed_trylock); -EXPORT_SYMBOL(__up_wakeup); - EXPORT_SYMBOL(__get_user_1); EXPORT_SYMBOL(__get_user_2); EXPORT_SYMBOL(__get_user_4); diff --git a/arch/x86/lib/semaphore_32.S b/arch/x86/lib/semaphore_32.S index 3899bd3..648fe47 100644 --- a/arch/x86/lib/semaphore_32.S +++ b/arch/x86/lib/semaphore_32.S @@ -30,89 +30,6 @@ * value or just clobbered.. */ .section .sched.text, "ax" -ENTRY(__down_failed) - CFI_STARTPROC - FRAME - pushl %edx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET edx,0 - pushl %ecx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET ecx,0 - call __down - popl %ecx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE ecx - popl %edx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE edx - ENDFRAME - ret - CFI_ENDPROC - ENDPROC(__down_failed) - -ENTRY(__down_failed_interruptible) - CFI_STARTPROC - FRAME - pushl %edx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET edx,0 - pushl %ecx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET ecx,0 - call __down_interruptible - popl %ecx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE ecx - popl %edx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE edx - ENDFRAME - ret - CFI_ENDPROC - ENDPROC(__down_failed_interruptible) - -ENTRY(__down_failed_trylock) - CFI_STARTPROC - FRAME - pushl %edx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET edx,0 - pushl %ecx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET ecx,0 - call __down_trylock - popl %ecx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE ecx - popl %edx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE edx - ENDFRAME - ret - CFI_ENDPROC - ENDPROC(__down_failed_trylock) - -ENTRY(__up_wakeup) - CFI_STARTPROC - FRAME - pushl %edx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET edx,0 - pushl %ecx - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET ecx,0 - call __up - popl %ecx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE ecx - popl %edx - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE edx - ENDFRAME - ret - CFI_ENDPROC - ENDPROC(__up_wakeup) /* * rw spinlock fallbacks diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/lib/thunk_64.S index 8b92d42..e009251 100644 --- a/arch/x86/lib/thunk_64.S +++ b/arch/x86/lib/thunk_64.S @@ -41,11 +41,6 @@ thunk rwsem_downgrade_thunk,rwsem_downgrade_wake #endif - thunk __down_failed,__down - thunk_retrax __down_failed_interruptible,__down_interruptible - thunk_retrax __down_failed_trylock,__down_trylock - thunk __up_wakeup,__up - #ifdef CONFIG_TRACE_IRQFLAGS thunk trace_hardirqs_on_thunk,trace_hardirqs_on thunk trace_hardirqs_off_thunk,trace_hardirqs_off |