diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2008-03-08 03:55:58 +0100 |
|---|---|---|
| committer | Matthew Wilcox <willy@linux.intel.com> | 2008-04-17 16:42:34 +0200 |
| commit | 64ac24e738823161693bf791f87adc802cf529ff (patch) | |
| tree | 19c0b0cf314d4394ca580c05b86cdf874ce0a167 /arch/m68k/lib | |
| parent | Add semaphore.h to kernel_lock.c (diff) | |
| download | linux-64ac24e738823161693bf791f87adc802cf529ff.tar.xz linux-64ac24e738823161693bf791f87adc802cf529ff.zip | |
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/m68k/lib')
| -rw-r--r-- | arch/m68k/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/m68k/lib/semaphore.S | 53 |
2 files changed, 1 insertions, 54 deletions
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile index 6bbf19f96007..a18af095cd7c 100644 --- a/arch/m68k/lib/Makefile +++ b/arch/m68k/lib/Makefile @@ -5,4 +5,4 @@ EXTRA_AFLAGS := -traditional lib-y := ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \ - checksum.o string.o semaphore.o uaccess.o + checksum.o string.o uaccess.o diff --git a/arch/m68k/lib/semaphore.S b/arch/m68k/lib/semaphore.S deleted file mode 100644 index 0215624c1602..000000000000 --- a/arch/m68k/lib/semaphore.S +++ /dev/null @@ -1,53 +0,0 @@ -/* - * linux/arch/m68k/lib/semaphore.S - * - * Copyright (C) 1996 Linus Torvalds - * - * m68k version by Andreas Schwab - */ - -#include <linux/linkage.h> -#include <asm/semaphore.h> - -/* - * The semaphore operations have a special calling sequence that - * allow us to do a simpler in-line version of them. These routines - * need to convert that sequence back into the C sequence when - * there is contention on the semaphore. - */ -ENTRY(__down_failed) - moveml %a0/%d0/%d1,-(%sp) - movel %a1,-(%sp) - jbsr __down - movel (%sp)+,%a1 - moveml (%sp)+,%a0/%d0/%d1 - rts - -ENTRY(__down_failed_interruptible) - movel %a0,-(%sp) - movel %d1,-(%sp) - movel %a1,-(%sp) - jbsr __down_interruptible - movel (%sp)+,%a1 - movel (%sp)+,%d1 - movel (%sp)+,%a0 - rts - -ENTRY(__down_failed_trylock) - movel %a0,-(%sp) - movel %d1,-(%sp) - movel %a1,-(%sp) - jbsr __down_trylock - movel (%sp)+,%a1 - movel (%sp)+,%d1 - movel (%sp)+,%a0 - rts - -ENTRY(__up_wakeup) - moveml %a0/%d0/%d1,-(%sp) - movel %a1,-(%sp) - jbsr __up - movel (%sp)+,%a1 - moveml (%sp)+,%a0/%d0/%d1 - rts - |