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| author |   David Howells <dhowells@redhat.com> | 2006-01-06 00:11:43 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:33 -0800 |
| commit | 5c40f7f373889930d176a515ec375b60a70b5b49 (patch) | |
| tree | 718d63553f5b9b23c5883592a2fe45b84f275687 /include/asm-frv | |
| parent | [PATCH] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU (diff) | |
| download | linux-dev-5c40f7f373889930d176a515ec375b60a70b5b49.tar.xz linux-dev-5c40f7f373889930d176a515ec375b60a70b5b49.zip | |
[PATCH] FRV: Implement futex operations for FRV
The attached patch implements futex operations for the FRV architecture. The
operations are applicable to both MMU and no-MMU modes; though the EFAULT
handling will be a little bit of wasted space on the latter.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-frv')
| -rw-r--r-- | include/asm-frv/futex.h | 42 |
1 files changed, 1 insertions, 41 deletions
diff --git a/include/asm-frv/futex.h b/include/asm-frv/futex.h index 9feff4ce1424..fca9d90e32c9 100644 --- a/include/asm-frv/futex.h +++ b/include/asm-frv/futex.h @@ -7,47 +7,7 @@ #include <asm/errno.h> #include <asm/uaccess.h> -static inline int -futex_atomic_op_inuser (int encoded_op, int __user *uaddr) -{ - int op = (encoded_op >> 28) & 7; - int cmp = (encoded_op >> 24) & 15; - int oparg = (encoded_op << 8) >> 20; - int cmparg = (encoded_op << 20) >> 20; - int oldval = 0, ret; - if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) - oparg = 1 << oparg; - - if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) - return -EFAULT; - - inc_preempt_count(); - - switch (op) { - case FUTEX_OP_SET: - case FUTEX_OP_ADD: - case FUTEX_OP_OR: - case FUTEX_OP_ANDN: - case FUTEX_OP_XOR: - default: - ret = -ENOSYS; - } - - dec_preempt_count(); - - if (!ret) { - switch (cmp) { - case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; - case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; - case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; - case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; - case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; - case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; - default: ret = -ENOSYS; - } - } - return ret; -} +extern int futex_atomic_op_inuser(int encoded_op, int __user *uaddr); #endif #endif |