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authorDavid Howells <dhowells@redhat.com>2006-01-06 00:11:43 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:33 -0800
commit5c40f7f373889930d176a515ec375b60a70b5b49 (patch)
tree718d63553f5b9b23c5883592a2fe45b84f275687 /include/asm-frv
parentb0e15190ead07056ab0c3844a499ff35e66d27cc (diff)
downloadop-kernel-dev-5c40f7f373889930d176a515ec375b60a70b5b49.zip
op-kernel-dev-5c40f7f373889930d176a515ec375b60a70b5b49.tar.gz
[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.h42
1 files changed, 1 insertions, 41 deletions
diff --git a/include/asm-frv/futex.h b/include/asm-frv/futex.h
index 9feff4ce..fca9d90 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
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