diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
commit | 8c82a17e9c924c0e9f13e75e4c2f6bca19a4b516 (patch) | |
tree | d535f46a917e14e90deccb29ad00aac016ad18dd /include/asm-parisc/futex.h | |
parent | 4ce72a2c063a7fa8e42a9435440ae3364115a58d (diff) | |
parent | 57f8f7b60db6f1ed2c6918ab9230c4623a9dbe37 (diff) |
Merge commit 'v2.6.28-rc1' into sched/urgent
Diffstat (limited to 'include/asm-parisc/futex.h')
-rw-r--r-- | include/asm-parisc/futex.h | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/include/asm-parisc/futex.h b/include/asm-parisc/futex.h deleted file mode 100644 index 0c705c3a55e..00000000000 --- a/include/asm-parisc/futex.h +++ /dev/null @@ -1,77 +0,0 @@ -#ifndef _ASM_PARISC_FUTEX_H -#define _ASM_PARISC_FUTEX_H - -#ifdef __KERNEL__ - -#include <linux/futex.h> -#include <linux/uaccess.h> -#include <asm/errno.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; - - pagefault_disable(); - - 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; - } - - pagefault_enable(); - - 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; -} - -/* Non-atomic version */ -static inline int -futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) -{ - int err = 0; - int uval; - - /* futex.c wants to do a cmpxchg_inatomic on kernel NULL, which is - * our gateway page, and causes no end of trouble... - */ - if (segment_eq(KERNEL_DS, get_fs()) && !uaddr) - return -EFAULT; - - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) - return -EFAULT; - - err = get_user(uval, uaddr); - if (err) return -EFAULT; - if (uval == oldval) - err = put_user(newval, uaddr); - if (err) return -EFAULT; - return uval; -} - -#endif /*__KERNEL__*/ -#endif /*_ASM_PARISC_FUTEX_H*/ |