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-rw-r--r--include/asm-i386/rwlock.h48
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