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Message-ID: <tip-c9ebe21b204f95e3aba84ee91c8b9347d73806f1@git.kernel.org>
Date: Thu, 14 Aug 2014 10:20:39 -0700
From: tip-bot for Peter Zijlstra <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
torvalds@...ux-foundation.org, peterz@...radead.org,
paulmck@...ux.vnet.ibm.com, tglx@...utronix.de,
takata@...ux-m32r.org
Subject: [tip:locking/arch] locking,arch,m32r: Fold atomic_ops
Commit-ID: c9ebe21b204f95e3aba84ee91c8b9347d73806f1
Gitweb: http://git.kernel.org/tip/c9ebe21b204f95e3aba84ee91c8b9347d73806f1
Author: Peter Zijlstra <peterz@...radead.org>
AuthorDate: Sun, 23 Mar 2014 19:02:22 +0100
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 14 Aug 2014 12:48:08 +0200
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@...radead.org>
Cc: Hirokazu Takata <takata@...ux-m32r.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: linux-m32r-ja@...linux-m32r.org
Cc: linux-m32r@...linux-m32r.org
Link: http://lkml.kernel.org/r/20140508135852.318635136@infradead.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/m32r/include/asm/atomic.h | 143 ++++++++++++++++-------------------------
1 file changed, 57 insertions(+), 86 deletions(-)
diff --git a/arch/m32r/include/asm/atomic.h b/arch/m32r/include/asm/atomic.h
index 8ad0ed4..3946b2c 100644
--- a/arch/m32r/include/asm/atomic.h
+++ b/arch/m32r/include/asm/atomic.h
@@ -39,85 +39,64 @@
*/
#define atomic_set(v,i) (((v)->counter) = (i))
-/**
- * atomic_add_return - add integer to atomic variable and return it
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v and return (@i + @v).
- */
-static __inline__ int atomic_add_return(int i, atomic_t *v)
-{
- unsigned long flags;
- int result;
-
- local_irq_save(flags);
- __asm__ __volatile__ (
- "# atomic_add_return \n\t"
- DCACHE_CLEAR("%0", "r4", "%1")
- M32R_LOCK" %0, @%1; \n\t"
- "add %0, %2; \n\t"
- M32R_UNLOCK" %0, @%1; \n\t"
- : "=&r" (result)
- : "r" (&v->counter), "r" (i)
- : "memory"
#ifdef CONFIG_CHIP_M32700_TS1
- , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
- );
- local_irq_restore(flags);
-
- return result;
+#define __ATOMIC_CLOBBER , "r4"
+#else
+#define __ATOMIC_CLOBBER
+#endif
+
+#define ATOMIC_OP(op) \
+static __inline__ void atomic_##op(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ int result; \
+ \
+ local_irq_save(flags); \
+ __asm__ __volatile__ ( \
+ "# atomic_" #op " \n\t" \
+ DCACHE_CLEAR("%0", "r4", "%1") \
+ M32R_LOCK" %0, @%1; \n\t" \
+ #op " %0, %2; \n\t" \
+ M32R_UNLOCK" %0, @%1; \n\t" \
+ : "=&r" (result) \
+ : "r" (&v->counter), "r" (i) \
+ : "memory" \
+ __ATOMIC_CLOBBER \
+ ); \
+ local_irq_restore(flags); \
+} \
+
+#define ATOMIC_OP_RETURN(op) \
+static __inline__ int atomic_##op##_return(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ int result; \
+ \
+ local_irq_save(flags); \
+ __asm__ __volatile__ ( \
+ "# atomic_" #op "_return \n\t" \
+ DCACHE_CLEAR("%0", "r4", "%1") \
+ M32R_LOCK" %0, @%1; \n\t" \
+ #op " %0, %2; \n\t" \
+ M32R_UNLOCK" %0, @%1; \n\t" \
+ : "=&r" (result) \
+ : "r" (&v->counter), "r" (i) \
+ : "memory" \
+ __ATOMIC_CLOBBER \
+ ); \
+ local_irq_restore(flags); \
+ \
+ return result; \
}
-/**
- * atomic_sub_return - subtract integer from atomic variable and return it
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v and return (@v - @i).
- */
-static __inline__ int atomic_sub_return(int i, atomic_t *v)
-{
- unsigned long flags;
- int result;
-
- local_irq_save(flags);
- __asm__ __volatile__ (
- "# atomic_sub_return \n\t"
- DCACHE_CLEAR("%0", "r4", "%1")
- M32R_LOCK" %0, @%1; \n\t"
- "sub %0, %2; \n\t"
- M32R_UNLOCK" %0, @%1; \n\t"
- : "=&r" (result)
- : "r" (&v->counter), "r" (i)
- : "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
- );
- local_irq_restore(flags);
-
- return result;
-}
+#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op)
-/**
- * atomic_add - add integer to atomic variable
- * @i: integer value to add
- * @v: pointer of type atomic_t
- *
- * Atomically adds @i to @v.
- */
-#define atomic_add(i,v) ((void) atomic_add_return((i), (v)))
+ATOMIC_OPS(add)
+ATOMIC_OPS(sub)
-/**
- * atomic_sub - subtract the atomic variable
- * @i: integer value to subtract
- * @v: pointer of type atomic_t
- *
- * Atomically subtracts @i from @v.
- */
-#define atomic_sub(i,v) ((void) atomic_sub_return((i), (v)))
+#undef ATOMIC_OPS
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
/**
* atomic_sub_and_test - subtract value from variable and test result
@@ -151,9 +130,7 @@ static __inline__ int atomic_inc_return(atomic_t *v)
: "=&r" (result)
: "r" (&v->counter)
: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
+ __ATOMIC_CLOBBER
);
local_irq_restore(flags);
@@ -181,9 +158,7 @@ static __inline__ int atomic_dec_return(atomic_t *v)
: "=&r" (result)
: "r" (&v->counter)
: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r4"
-#endif /* CONFIG_CHIP_M32700_TS1 */
+ __ATOMIC_CLOBBER
);
local_irq_restore(flags);
@@ -280,9 +255,7 @@ static __inline__ void atomic_clear_mask(unsigned long mask, atomic_t *addr)
: "=&r" (tmp)
: "r" (addr), "r" (~mask)
: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r5"
-#endif /* CONFIG_CHIP_M32700_TS1 */
+ __ATOMIC_CLOBBER
);
local_irq_restore(flags);
}
@@ -302,9 +275,7 @@ static __inline__ void atomic_set_mask(unsigned long mask, atomic_t *addr)
: "=&r" (tmp)
: "r" (addr), "r" (mask)
: "memory"
-#ifdef CONFIG_CHIP_M32700_TS1
- , "r5"
-#endif /* CONFIG_CHIP_M32700_TS1 */
+ __ATOMIC_CLOBBER
);
local_irq_restore(flags);
}
--
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