lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <tip-b93c7b8c5b281bf3646d6c5b6e05249b98cc5ab7@git.kernel.org>
Date:	Thu, 14 Aug 2014 10:18:48 -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, mattst88@...il.com,
	ink@...assic.park.msu.ru, tglx@...utronix.de, rth@...ddle.net
Subject: [tip:locking/arch] locking,arch,alpha: Fold atomic_ops

Commit-ID:  b93c7b8c5b281bf3646d6c5b6e05249b98cc5ab7
Gitweb:     http://git.kernel.org/tip/b93c7b8c5b281bf3646d6c5b6e05249b98cc5ab7
Author:     Peter Zijlstra <peterz@...radead.org>
AuthorDate: Sun, 23 Mar 2014 16:25:53 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 14 Aug 2014 12:48:03 +0200

locking,arch,alpha: 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.

Cc: Matt Turner <mattst88@...il.com>
Cc: Richard Henderson <rth@...ddle.net>
Cc: Ivan Kokshaysky <ink@...assic.park.msu.ru>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>

Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Cc: Ivan Kokshaysky <ink@...assic.park.msu.ru>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Matt Turner <mattst88@...il.com>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Richard Henderson <rth@...ddle.net>
Cc: linux-alpha@...r.kernel.org
Link: http://lkml.kernel.org/r/20140508135851.832107183@infradead.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/alpha/include/asm/atomic.h | 213 +++++++++++++++-------------------------
 1 file changed, 80 insertions(+), 133 deletions(-)

diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h
index ed60a1e..6fbb53a 100644
--- a/arch/alpha/include/asm/atomic.h
+++ b/arch/alpha/include/asm/atomic.h
@@ -29,145 +29,92 @@
  * branch back to restart the operation.
  */
 
-static __inline__ void atomic_add(int i, atomic_t * v)
-{
-	unsigned long temp;
-	__asm__ __volatile__(
-	"1:	ldl_l %0,%1\n"
-	"	addl %0,%2,%0\n"
-	"	stl_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter)
-	:"Ir" (i), "m" (v->counter));
-}
-
-static __inline__ void atomic64_add(long i, atomic64_t * v)
-{
-	unsigned long temp;
-	__asm__ __volatile__(
-	"1:	ldq_l %0,%1\n"
-	"	addq %0,%2,%0\n"
-	"	stq_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter)
-	:"Ir" (i), "m" (v->counter));
-}
-
-static __inline__ void atomic_sub(int i, atomic_t * v)
-{
-	unsigned long temp;
-	__asm__ __volatile__(
-	"1:	ldl_l %0,%1\n"
-	"	subl %0,%2,%0\n"
-	"	stl_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter)
-	:"Ir" (i), "m" (v->counter));
+#define ATOMIC_OP(op)							\
+static __inline__ void atomic_##op(int i, atomic_t * v)			\
+{									\
+	unsigned long temp;						\
+	__asm__ __volatile__(						\
+	"1:	ldl_l %0,%1\n"						\
+	"	" #op "l %0,%2,%0\n"					\
+	"	stl_c %0,%1\n"						\
+	"	beq %0,2f\n"						\
+	".subsection 2\n"						\
+	"2:	br 1b\n"						\
+	".previous"							\
+	:"=&r" (temp), "=m" (v->counter)				\
+	:"Ir" (i), "m" (v->counter));					\
+}									\
+
+#define ATOMIC_OP_RETURN(op)						\
+static inline int atomic_##op##_return(int i, atomic_t *v)		\
+{									\
+	long temp, result;						\
+	smp_mb();							\
+	__asm__ __volatile__(						\
+	"1:	ldl_l %0,%1\n"						\
+	"	" #op "l %0,%3,%2\n"					\
+	"	" #op "l %0,%3,%0\n"					\
+	"	stl_c %0,%1\n"						\
+	"	beq %0,2f\n"						\
+	".subsection 2\n"						\
+	"2:	br 1b\n"						\
+	".previous"							\
+	:"=&r" (temp), "=m" (v->counter), "=&r" (result)		\
+	:"Ir" (i), "m" (v->counter) : "memory");			\
+	smp_mb();							\
+	return result;							\
 }
 
-static __inline__ void atomic64_sub(long i, atomic64_t * v)
-{
-	unsigned long temp;
-	__asm__ __volatile__(
-	"1:	ldq_l %0,%1\n"
-	"	subq %0,%2,%0\n"
-	"	stq_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter)
-	:"Ir" (i), "m" (v->counter));
-}
-
-
-/*
- * Same as above, but return the result value
- */
-static inline int atomic_add_return(int i, atomic_t *v)
-{
-	long temp, result;
-	smp_mb();
-	__asm__ __volatile__(
-	"1:	ldl_l %0,%1\n"
-	"	addl %0,%3,%2\n"
-	"	addl %0,%3,%0\n"
-	"	stl_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter), "=&r" (result)
-	:"Ir" (i), "m" (v->counter) : "memory");
-	smp_mb();
-	return result;
+#define ATOMIC64_OP(op)							\
+static __inline__ void atomic64_##op(long i, atomic64_t * v)		\
+{									\
+	unsigned long temp;						\
+	__asm__ __volatile__(						\
+	"1:	ldq_l %0,%1\n"						\
+	"	" #op "q %0,%2,%0\n"					\
+	"	stq_c %0,%1\n"						\
+	"	beq %0,2f\n"						\
+	".subsection 2\n"						\
+	"2:	br 1b\n"						\
+	".previous"							\
+	:"=&r" (temp), "=m" (v->counter)				\
+	:"Ir" (i), "m" (v->counter));					\
+}									\
+
+#define ATOMIC64_OP_RETURN(op)						\
+static __inline__ long atomic64_##op##_return(long i, atomic64_t * v)	\
+{									\
+	long temp, result;						\
+	smp_mb();							\
+	__asm__ __volatile__(						\
+	"1:	ldq_l %0,%1\n"						\
+	"	" #op "q %0,%3,%2\n"					\
+	"	" #op "q %0,%3,%0\n"					\
+	"	stq_c %0,%1\n"						\
+	"	beq %0,2f\n"						\
+	".subsection 2\n"						\
+	"2:	br 1b\n"						\
+	".previous"							\
+	:"=&r" (temp), "=m" (v->counter), "=&r" (result)		\
+	:"Ir" (i), "m" (v->counter) : "memory");			\
+	smp_mb();							\
+	return result;							\
 }
 
-static __inline__ long atomic64_add_return(long i, atomic64_t * v)
-{
-	long temp, result;
-	smp_mb();
-	__asm__ __volatile__(
-	"1:	ldq_l %0,%1\n"
-	"	addq %0,%3,%2\n"
-	"	addq %0,%3,%0\n"
-	"	stq_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter), "=&r" (result)
-	:"Ir" (i), "m" (v->counter) : "memory");
-	smp_mb();
-	return result;
-}
+#define ATOMIC_OPS(opg)							\
+	ATOMIC_OP(opg)							\
+	ATOMIC_OP_RETURN(opg)						\
+	ATOMIC64_OP(opg)						\
+	ATOMIC64_OP_RETURN(opg)
 
-static __inline__ long atomic_sub_return(int i, atomic_t * v)
-{
-	long temp, result;
-	smp_mb();
-	__asm__ __volatile__(
-	"1:	ldl_l %0,%1\n"
-	"	subl %0,%3,%2\n"
-	"	subl %0,%3,%0\n"
-	"	stl_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter), "=&r" (result)
-	:"Ir" (i), "m" (v->counter) : "memory");
-	smp_mb();
-	return result;
-}
+ATOMIC_OPS(add)
+ATOMIC_OPS(sub)
 
-static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
-{
-	long temp, result;
-	smp_mb();
-	__asm__ __volatile__(
-	"1:	ldq_l %0,%1\n"
-	"	subq %0,%3,%2\n"
-	"	subq %0,%3,%0\n"
-	"	stq_c %0,%1\n"
-	"	beq %0,2f\n"
-	".subsection 2\n"
-	"2:	br 1b\n"
-	".previous"
-	:"=&r" (temp), "=m" (v->counter), "=&r" (result)
-	:"Ir" (i), "m" (v->counter) : "memory");
-	smp_mb();
-	return result;
-}
+#undef ATOMIC_OPS
+#undef ATOMIC64_OP_RETURN
+#undef ATOMIC64_OP
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
 
 #define atomic64_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
 #define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ