[PATCH 11/12] generic ext2_{set,clear}_bit_atomic()
From: Akinobu Mita
Date: Wed Jan 25 2006 - 22:36:57 EST
- Next message: Akinobu Mita: "[PATCH 12/12] generic minix_{test,set,test_and_clear,test,find_first_zero}_bit()"
- Previous message: Akinobu Mita: "[PATCH 10/12] generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()"
- In reply to: Akinobu Mita: "[PATCH 10/12] generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()"
- Next in thread: Akinobu Mita: "[PATCH 12/12] generic minix_{test,set,test_and_clear,test,find_first_zero}_bit()"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
This patch introduces the C-language equivalents of the functions below:
int ext2_set_bit_atomic(int nr, volatile unsigned long *addr);
int ext2_clear_bit_atomic(int nr, volatile unsigned long *addr);
HAVE_ARCH_EXT2_ATOMIC_BITOPS is defined when the architecture has its
own
version of these functions.
This code largely copied from:
include/asm-sparc/bitops.h
Index: 2.6-git/include/asm-generic/bitops.h
===================================================================
--- 2.6-git.orig/include/asm-generic/bitops.h 2006-01-25 19:14:11.000000000 +0900
+++ 2.6-git/include/asm-generic/bitops.h 2006-01-25 19:14:12.000000000 +0900
@@ -645,6 +645,28 @@
#endif /* HAVE_ARCH_EXT2_NON_ATOMIC_BITOPS */
+#ifndef HAVE_ARCH_EXT2_ATOMIC_BITOPS
+
+#define ext2_set_bit_atomic(lock, nr, addr) \
+ ({ \
+ int ret; \
+ spin_lock(lock); \
+ ret = ext2_set_bit((nr), (unsigned long *)(addr)); \
+ spin_unlock(lock); \
+ ret; \
+ })
+
+#define ext2_clear_bit_atomic(lock, nr, addr) \
+ ({ \
+ int ret; \
+ spin_lock(lock); \
+ ret = ext2_clear_bit((nr), (unsigned long *)(addr)); \
+ spin_unlock(lock); \
+ ret; \
+ })
+
+#endif /* HAVE_ARCH_EXT2_ATOMIC_BITOPS */
+
#endif /* __KERNEL__ */
#endif /* _ASM_GENERIC_BITOPS_H */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
- Next message: Akinobu Mita: "[PATCH 12/12] generic minix_{test,set,test_and_clear,test,find_first_zero}_bit()"
- Previous message: Akinobu Mita: "[PATCH 10/12] generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()"
- In reply to: Akinobu Mita: "[PATCH 10/12] generic ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()"
- Next in thread: Akinobu Mita: "[PATCH 12/12] generic minix_{test,set,test_and_clear,test,find_first_zero}_bit()"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]