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authorPeter Zijlstra <peterz@infradead.org>2014-03-23 14:02:22 -0400
committerIngo Molnar <mingo@kernel.org>2014-08-14 06:48:08 -0400
commitc9ebe21b204f95e3aba84ee91c8b9347d73806f1 (patch)
treeabf61d62414e8578e381da5bbd7875abeda82781 /arch/m32r
parent08be2dab191431f23f5f98ba2db76513d0d853e7 (diff)
locking,arch,m32r: Fold atomic_ops
Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: linux-m32r-ja@ml.linux-m32r.org Cc: linux-m32r@ml.linux-m32r.org Link: http://lkml.kernel.org/r/20140508135852.318635136@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/m32r')
-rw-r--r--arch/m32r/include/asm/atomic.h143
1 files changed, 57 insertions, 86 deletions
diff --git a/arch/m32r/include/asm/atomic.h b/arch/m32r/include/asm/atomic.h
index 8ad0ed4182a5..3946b2c8d971 100644
--- a/arch/m32r/include/asm/atomic.h
+++ b/arch/m32r/include/asm/atomic.h
@@ -39,85 +39,64 @@
39 */ 39 */
40#define atomic_set(v,i) (((v)->counter) = (i)) 40#define atomic_set(v,i) (((v)->counter) = (i))
41 41
42/**
43 * atomic_add_return - add integer to atomic variable and return it
44 * @i: integer value to add
45 * @v: pointer of type atomic_t
46 *
47 * Atomically adds @i to @v and return (@i + @v).
48 */
49static __inline__ int atomic_add_return(int i, atomic_t *v)
50{
51 unsigned long flags;
52 int result;
53
54 local_irq_save(flags);
55 __asm__ __volatile__ (
56 "# atomic_add_return \n\t"
57 DCACHE_CLEAR("%0", "r4", "%1")
58 M32R_LOCK" %0, @%1; \n\t"
59 "add %0, %2; \n\t"
60 M32R_UNLOCK" %0, @%1; \n\t"
61 : "=&r" (result)
62 : "r" (&v->counter), "r" (i)
63 : "memory"
64#ifdef CONFIG_CHIP_M32700_TS1 42#ifdef CONFIG_CHIP_M32700_TS1
65 , "r4" 43#define __ATOMIC_CLOBBER , "r4"
66#endif /* CONFIG_CHIP_M32700_TS1 */ 44#else
67 ); 45#define __ATOMIC_CLOBBER
68 local_irq_restore(flags); 46#endif
69 47
70 return result; 48#define ATOMIC_OP(op) \
49static __inline__ void atomic_##op(int i, atomic_t *v) \
50{ \
51 unsigned long flags; \
52 int result; \
53 \
54 local_irq_save(flags); \
55 __asm__ __volatile__ ( \
56 "# atomic_" #op " \n\t" \
57 DCACHE_CLEAR("%0", "r4", "%1") \
58 M32R_LOCK" %0, @%1; \n\t" \
59 #op " %0, %2; \n\t" \
60 M32R_UNLOCK" %0, @%1; \n\t" \
61 : "=&r" (result) \
62 : "r" (&v->counter), "r" (i) \
63 : "memory" \
64 __ATOMIC_CLOBBER \
65 ); \
66 local_irq_restore(flags); \
67} \
68
69#define ATOMIC_OP_RETURN(op) \
70static __inline__ int atomic_##op##_return(int i, atomic_t *v) \
71{ \
72 unsigned long flags; \
73 int result; \
74 \
75 local_irq_save(flags); \
76 __asm__ __volatile__ ( \
77 "# atomic_" #op "_return \n\t" \
78 DCACHE_CLEAR("%0", "r4", "%1") \
79 M32R_LOCK" %0, @%1; \n\t" \
80 #op " %0, %2; \n\t" \
81 M32R_UNLOCK" %0, @%1; \n\t" \
82 : "=&r" (result) \
83 : "r" (&v->counter), "r" (i) \
84 : "memory" \
85 __ATOMIC_CLOBBER \
86 ); \
87 local_irq_restore(flags); \
88 \
89 return result; \
71} 90}
72 91
73/** 92#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op)
74 * atomic_sub_return - subtract integer from atomic variable and return it
75 * @i: integer value to subtract
76 * @v: pointer of type atomic_t
77 *
78 * Atomically subtracts @i from @v and return (@v - @i).
79 */
80static __inline__ int atomic_sub_return(int i, atomic_t *v)
81{
82 unsigned long flags;
83 int result;
84
85 local_irq_save(flags);
86 __asm__ __volatile__ (
87 "# atomic_sub_return \n\t"
88 DCACHE_CLEAR("%0", "r4", "%1")
89 M32R_LOCK" %0, @%1; \n\t"
90 "sub %0, %2; \n\t"
91 M32R_UNLOCK" %0, @%1; \n\t"
92 : "=&r" (result)
93 : "r" (&v->counter), "r" (i)
94 : "memory"
95#ifdef CONFIG_CHIP_M32700_TS1
96 , "r4"
97#endif /* CONFIG_CHIP_M32700_TS1 */
98 );
99 local_irq_restore(flags);
100
101 return result;
102}
103 93
104/** 94ATOMIC_OPS(add)
105 * atomic_add - add integer to atomic variable 95ATOMIC_OPS(sub)
106 * @i: integer value to add
107 * @v: pointer of type atomic_t
108 *
109 * Atomically adds @i to @v.
110 */
111#define atomic_add(i,v) ((void) atomic_add_return((i), (v)))
112 96
113/** 97#undef ATOMIC_OPS
114 * atomic_sub - subtract the atomic variable 98#undef ATOMIC_OP_RETURN
115 * @i: integer value to subtract 99#undef ATOMIC_OP
116 * @v: pointer of type atomic_t
117 *
118 * Atomically subtracts @i from @v.
119 */
120#define atomic_sub(i,v) ((void) atomic_sub_return((i), (v)))
121 100
122/** 101/**
123 * atomic_sub_and_test - subtract value from variable and test result 102 * atomic_sub_and_test - subtract value from variable and test result
@@ -151,9 +130,7 @@ static __inline__ int atomic_inc_return(atomic_t *v)
151 : "=&r" (result) 130 : "=&r" (result)
152 : "r" (&v->counter) 131 : "r" (&v->counter)
153 : "memory" 132 : "memory"
154#ifdef CONFIG_CHIP_M32700_TS1 133 __ATOMIC_CLOBBER
155 , "r4"
156#endif /* CONFIG_CHIP_M32700_TS1 */
157 ); 134 );
158 local_irq_restore(flags); 135 local_irq_restore(flags);
159 136
@@ -181,9 +158,7 @@ static __inline__ int atomic_dec_return(atomic_t *v)
181 : "=&r" (result) 158 : "=&r" (result)
182 : "r" (&v->counter) 159 : "r" (&v->counter)
183 : "memory" 160 : "memory"
184#ifdef CONFIG_CHIP_M32700_TS1 161 __ATOMIC_CLOBBER
185 , "r4"
186#endif /* CONFIG_CHIP_M32700_TS1 */
187 ); 162 );
188 local_irq_restore(flags); 163 local_irq_restore(flags);
189 164
@@ -280,9 +255,7 @@ static __inline__ void atomic_clear_mask(unsigned long mask, atomic_t *addr)
280 : "=&r" (tmp) 255 : "=&r" (tmp)
281 : "r" (addr), "r" (~mask) 256 : "r" (addr), "r" (~mask)
282 : "memory" 257 : "memory"
283#ifdef CONFIG_CHIP_M32700_TS1 258 __ATOMIC_CLOBBER
284 , "r5"
285#endif /* CONFIG_CHIP_M32700_TS1 */
286 ); 259 );
287 local_irq_restore(flags); 260 local_irq_restore(flags);
288} 261}
@@ -302,9 +275,7 @@ static __inline__ void atomic_set_mask(unsigned long mask, atomic_t *addr)
302 : "=&r" (tmp) 275 : "=&r" (tmp)
303 : "r" (addr), "r" (mask) 276 : "r" (addr), "r" (mask)
304 : "memory" 277 : "memory"
305#ifdef CONFIG_CHIP_M32700_TS1 278 __ATOMIC_CLOBBER
306 , "r5"
307#endif /* CONFIG_CHIP_M32700_TS1 */
308 ); 279 );
309 local_irq_restore(flags); 280 local_irq_restore(flags);
310} 281}
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