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| author | Jody McIntyre <scjody@modernduck.com> | 2006-03-28 20:24:39 -0500 |
|---|---|---|
| committer | Jody McIntyre <scjody@modernduck.com> | 2006-03-28 20:24:39 -0500 |
| commit | c0e4077c946104e5d8a62f835dcdca5c79c8af7d (patch) | |
| tree | c1f458722f86690a6172bbac2dfef3241ba0ec7e /include/asm-sparc64/futex.h | |
| parent | 94c2d01a537daf51a9fcf229d7d2204c979355d9 (diff) | |
| parent | ca9ba4471c1203bb6e759b76e83167fec54fe590 (diff) | |
Merge with git+ssh://master.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'include/asm-sparc64/futex.h')
| -rw-r--r-- | include/asm-sparc64/futex.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-sparc64/futex.h b/include/asm-sparc64/futex.h index 34c4b43d3f9..dee40206b22 100644 --- a/include/asm-sparc64/futex.h +++ b/include/asm-sparc64/futex.h @@ -83,4 +83,28 @@ static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr) return ret; } +static inline int +futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) +{ + __asm__ __volatile__( + "\n1: lduwa [%2] %%asi, %0\n" + "2: casa [%2] %%asi, %0, %1\n" + "3:\n" + " .section .fixup,#alloc,#execinstr\n" + " .align 4\n" + "4: ba 3b\n" + " mov %3, %0\n" + " .previous\n" + " .section __ex_table,\"a\"\n" + " .align 4\n" + " .word 1b, 4b\n" + " .word 2b, 4b\n" + " .previous\n" + : "=&r" (oldval) + : "r" (newval), "r" (uaddr), "i" (-EFAULT) + : "memory"); + + return oldval; +} + #endif /* !(_SPARC64_FUTEX_H) */ |