diff options
Diffstat (limited to 'include/asm-i386/rwlock.h')
-rw-r--r-- | include/asm-i386/rwlock.h | 48 |
1 files changed, 1 insertions, 47 deletions
diff --git a/include/asm-i386/rwlock.h b/include/asm-i386/rwlock.h index 87c069ccba08..c3e5db32fa48 100644 --- a/include/asm-i386/rwlock.h +++ b/include/asm-i386/rwlock.h | |||
@@ -20,52 +20,6 @@ | |||
20 | #define RW_LOCK_BIAS 0x01000000 | 20 | #define RW_LOCK_BIAS 0x01000000 |
21 | #define RW_LOCK_BIAS_STR "0x01000000" | 21 | #define RW_LOCK_BIAS_STR "0x01000000" |
22 | 22 | ||
23 | #define __build_read_lock_ptr(rw, helper) \ | 23 | /* Code is in asm-i386/spinlock.h */ |
24 | asm volatile(LOCK_PREFIX " subl $1,(%0)\n\t" \ | ||
25 | "jns 1f\n" \ | ||
26 | "call " helper "\n\t" \ | ||
27 | "1:\n" \ | ||
28 | ::"a" (rw) : "memory") | ||
29 | |||
30 | #define __build_read_lock_const(rw, helper) \ | ||
31 | asm volatile(LOCK_PREFIX " subl $1,%0\n\t" \ | ||
32 | "jns 1f\n" \ | ||
33 | "pushl %%eax\n\t" \ | ||
34 | "leal %0,%%eax\n\t" \ | ||
35 | "call " helper "\n\t" \ | ||
36 | "popl %%eax\n\t" \ | ||
37 | "1:\n" \ | ||
38 | :"+m" (*(volatile int *)rw) : : "memory") | ||
39 | |||
40 | #define __build_read_lock(rw, helper) do { \ | ||
41 | if (__builtin_constant_p(rw)) \ | ||
42 | __build_read_lock_const(rw, helper); \ | ||
43 | else \ | ||
44 | __build_read_lock_ptr(rw, helper); \ | ||
45 | } while (0) | ||
46 | |||
47 | #define __build_write_lock_ptr(rw, helper) \ | ||
48 | asm volatile(LOCK_PREFIX " subl $" RW_LOCK_BIAS_STR ",(%0)\n\t" \ | ||
49 | "jz 1f\n" \ | ||
50 | "call " helper "\n\t" \ | ||
51 | "1:\n" \ | ||
52 | ::"a" (rw) : "memory") | ||
53 | |||
54 | #define __build_write_lock_const(rw, helper) \ | ||
55 | asm volatile(LOCK_PREFIX " subl $" RW_LOCK_BIAS_STR ",%0\n\t" \ | ||
56 | "jz 1f\n" \ | ||
57 | "pushl %%eax\n\t" \ | ||
58 | "leal %0,%%eax\n\t" \ | ||
59 | "call " helper "\n\t" \ | ||
60 | "popl %%eax\n\t" \ | ||
61 | "1:\n" \ | ||
62 | :"+m" (*(volatile int *)rw) : : "memory") | ||
63 | |||
64 | #define __build_write_lock(rw, helper) do { \ | ||
65 | if (__builtin_constant_p(rw)) \ | ||
66 | __build_write_lock_const(rw, helper); \ | ||
67 | else \ | ||
68 | __build_write_lock_ptr(rw, helper); \ | ||
69 | } while (0) | ||
70 | 24 | ||
71 | #endif | 25 | #endif |