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authorMatthew Wilcox <matthew@wil.cx>2008-03-07 21:55:58 -0500
committerMatthew Wilcox <willy@linux.intel.com>2008-04-17 10:42:34 -0400
commit64ac24e738823161693bf791f87adc802cf529ff (patch)
tree19c0b0cf314d4394ca580c05b86cdf874ce0a167 /arch/m68knommu/lib
parente48b3deee475134585eed03e7afebe4bf9e0dba9 (diff)
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/m68knommu/lib')
-rw-r--r--arch/m68knommu/lib/Makefile2
-rw-r--r--arch/m68knommu/lib/semaphore.S66
2 files changed, 1 insertions, 67 deletions
diff --git a/arch/m68knommu/lib/Makefile b/arch/m68knommu/lib/Makefile
index e051a7913987..d94d709665aa 100644
--- a/arch/m68knommu/lib/Makefile
+++ b/arch/m68knommu/lib/Makefile
@@ -4,4 +4,4 @@
lib-y := ashldi3.o ashrdi3.o lshrdi3.o \
muldi3.o mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o \
- checksum.o semaphore.o memcpy.o memset.o delay.o
+ checksum.o memcpy.o memset.o delay.o
diff --git a/arch/m68knommu/lib/semaphore.S b/arch/m68knommu/lib/semaphore.S
deleted file mode 100644
index 87c746034376..000000000000
--- a/arch/m68knommu/lib/semaphore.S
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * linux/arch/m68k/lib/semaphore.S
- *
- * Copyright (C) 1996 Linus Torvalds
- *
- * m68k version by Andreas Schwab
- *
- * MAR/1999 -- modified to support ColdFire (gerg@snapgear.com)
- */
-
-#include <linux/linkage.h>
-#include <asm/semaphore.h>
-
-/*
- * "down_failed" is called with the eventual return address
- * in %a0, and the address of the semaphore in %a1. We need
- * to increment the number of waiters on the semaphore,
- * call "__down()", and then eventually return to try again.
- */
-ENTRY(__down_failed)
-#ifdef CONFIG_COLDFIRE
- subl #12,%sp
- moveml %a0/%d0/%d1,(%sp)
-#else
- moveml %a0/%d0/%d1,-(%sp)
-#endif
- movel %a1,-(%sp)
- jbsr __down
- movel (%sp)+,%a1
- movel (%sp)+,%d0
- movel (%sp)+,%d1
- rts
-
-ENTRY(__down_failed_interruptible)
- movel %a0,-(%sp)
- movel %d1,-(%sp)
- movel %a1,-(%sp)
- jbsr __down_interruptible
- movel (%sp)+,%a1
- movel (%sp)+,%d1
- rts
-
-ENTRY(__up_wakeup)
-#ifdef CONFIG_COLDFIRE
- subl #12,%sp
- moveml %a0/%d0/%d1,(%sp)
-#else
- moveml %a0/%d0/%d1,-(%sp)
-#endif
- movel %a1,-(%sp)
- jbsr __up
- movel (%sp)+,%a1
- movel (%sp)+,%d0
- movel (%sp)+,%d1
- 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
-