Commit-ID: b7271b9f3e18181559b96a610f4e42bdb04b07f5
Gitweb: http://git.kernel.org/tip/b7271b9f3e18181559b96a610f4e42bdb04b07f5
Author: Peter Zijlstra <pet...@infradead.org>
AuthorDate: Wed, 22 Jun 2016 11:16:49 +0200
Committer: Ingo Molnar <mi...@kernel.org>
CommitDate: Fri, 24 Jun 2016 08:17:04 +0200
locking/atomic, arch/tile: Fix tilepro build
The tilepro change wasn't ever compiled it seems (the 0day built bot
also doesn't have a toolchain for it).
Make it work.
The thing that makes the patch bigger than desired is namespace
collision with the C11 __atomic builtin functions. So rename the
tilepro functions to __atomic32.
Reported-by: Sudip Mukherjee <sudipm.mukher...@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Acked-by: Chris Metcalf <cmetc...@mellanox.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephen Rothwell <s...@canb.auug.org.au>
Cc: Thomas Gleixner <t...@linutronix.de>
Fixes: 1af5de9af138 ("locking/atomic, arch/tile: Implement
atomic{,64}_fetch_{add,sub,and,or,xor}()")
Link:
http://lkml.kernel.org/r/20160622091649.gb30...@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/tile/include/asm/atomic_32.h | 24 ++++++++++++------------
arch/tile/include/asm/futex.h | 14 +++++++-------
arch/tile/lib/atomic_32.c | 16 ++++++++--------
arch/tile/lib/atomic_asm_32.S | 21 +++++++++++++--------
4 files changed, 40 insertions(+), 35 deletions(-)
diff --git a/arch/tile/include/asm/atomic_32.h
b/arch/tile/include/asm/atomic_32.h
index da8eb4e..a937742 100644
--- a/arch/tile/include/asm/atomic_32.h
+++ b/arch/tile/include/asm/atomic_32.h
@@ -143,15 +143,15 @@ static inline void atomic64_##op(long long i, atomic64_t
*v) \
{ \
_atomic64_fetch_##op(&v->counter, i); \
} \
-static inline void atomic64_##op(long long i, atomic64_t *v) \
+static inline long long atomic64_fetch_##op(long long i, atomic64_t *v)
\
{ \
smp_mb(); \
return _atomic64_fetch_##op(&v->counter, i); \
}
-ATOMIC64_OP(and)
-ATOMIC64_OP(or)
-ATOMIC64_OP(xor)
+ATOMIC64_OPS(and)
+ATOMIC64_OPS(or)
+ATOMIC64_OPS(xor)
#undef ATOMIC64_OPS
@@ -266,16 +266,16 @@ struct __get_user {
unsigned long val;
int err;
};
-extern struct __get_user __atomic_cmpxchg(volatile int *p,
+extern struct __get_user __atomic32_cmpxchg(volatile int *p,
int *lock, int o, int n);
-extern struct __get_user __atomic_xchg(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_xchg_add(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_xchg_add_unless(volatile int *p,
+extern struct __get_user __atomic32_xchg(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic32_xchg_add(volatile int *p, int *lock, int
n);
+extern struct __get_user __atomic32_xchg_add_unless(volatile int *p,
int *lock, int o, int n);
-extern struct __get_user __atomic_fetch_or(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_fetch_and(volatile int *p, int *lock, int n);
-extern struct __get_user __atomic_fetch_andn(volatile int *p, int *lock, int
n);
-extern struct __get_user __atomic_fetch_xor(volatile int *p, int *lock, int n);
+extern struct __get_user __atomic32_fetch_or(volatile int *p, int *lock, int
n);
+extern struct __get_user __atomic32_fetch_and(volatile int *p, int *lock, int
n);
+extern struct __get_user __atomic32_fetch_andn(volatile int *p, int *lock, int
n);
+extern struct __get_user __atomic32_fetch_xor(volatile int *p, int *lock, int
n);
extern long long __atomic64_cmpxchg(volatile long long *p, int *lock,
long long o, long long n);
extern long long __atomic64_xchg(volatile long long *p, int *lock, long long
n);
diff --git a/arch/tile/include/asm/futex.h b/arch/tile/include/asm/futex.h
index 1a6ef1b..e64a1b7 100644
--- a/arch/tile/include/asm/futex.h
+++ b/arch/tile/include/asm/futex.h
@@ -80,16 +80,16 @@
ret = gu.err; \
}
-#define __futex_set() __futex_call(__atomic_xchg)
-#define __futex_add() __futex_call(__atomic_xchg_add)
-#define __futex_or() __futex_call(__atomic_or)
-#define __futex_andn() __futex_call(__atomic_andn)
-#define __futex_xor() __futex_call(__atomic_xor)
+#define __futex_set() __futex_call(__atomic32_xchg)
+#define __futex_add() __futex_call(__atomic32_xchg_add)
+#define __futex_or() __futex_call(__atomic32_fetch_or)
+#define __futex_andn() __futex_call(__atomic32_fetch_andn)
+#define __futex_xor() __futex_call(__atomic32_fetch_xor)
#define __futex_cmpxchg() \
{ \
- struct __get_user gu = __atomic_cmpxchg((u32 __force *)uaddr, \
- lock, oldval, oparg); \
+ struct __get_user gu = __atomic32_cmpxchg((u32 __force *)uaddr,
\
+ lock, oldval, oparg);
\
val = gu.val; \
ret = gu.err; \
}
diff --git a/arch/tile/lib/atomic_32.c b/arch/tile/lib/atomic_32.c
index 5b6bd93..f812880 100644
--- a/arch/tile/lib/atomic_32.c
+++ b/arch/tile/lib/atomic_32.c
@@ -61,13 +61,13 @@ static inline int *__atomic_setup(volatile void *v)
int _atomic_xchg(int *v, int n)
{
- return __atomic_xchg(v, __atomic_setup(v), n).val;
+ return __atomic32_xchg(v, __atomic_setup(v), n).val;
}
EXPORT_SYMBOL(_atomic_xchg);
int _atomic_xchg_add(int *v, int i)
{
- return __atomic_xchg_add(v, __atomic_setup(v), i).val;
+ return __atomic32_xchg_add(v, __atomic_setup(v), i).val;
}
EXPORT_SYMBOL(_atomic_xchg_add);
@@ -78,37 +78,37 @@ int _atomic_xchg_add_unless(int *v, int a, int u)
* to use the first argument consistently as the "old value"
* in the assembly, as is done for _atomic_cmpxchg().
*/
- return __atomic_xchg_add_unless(v, __atomic_setup(v), u, a).val;
+ return __atomic32_xchg_add_unless(v, __atomic_setup(v), u, a).val;
}
EXPORT_SYMBOL(_atomic_xchg_add_unless);
int _atomic_cmpxchg(int *v, int o, int n)
{
- return __atomic_cmpxchg(v, __atomic_setup(v), o, n).val;
+ return __atomic32_cmpxchg(v, __atomic_setup(v), o, n).val;
}
EXPORT_SYMBOL(_atomic_cmpxchg);
unsigned long _atomic_fetch_or(volatile unsigned long *p, unsigned long mask)
{
- return __atomic_fetch_or((int *)p, __atomic_setup(p), mask).val;
+ return __atomic32_fetch_or((int *)p, __atomic_setup(p), mask).val;
}
EXPORT_SYMBOL(_atomic_fetch_or);
unsigned long _atomic_fetch_and(volatile unsigned long *p, unsigned long mask)
{
- return __atomic_fetch_and((int *)p, __atomic_setup(p), mask).val;
+ return __atomic32_fetch_and((int *)p, __atomic_setup(p), mask).val;
}
EXPORT_SYMBOL(_atomic_fetch_and);
unsigned long _atomic_fetch_andn(volatile unsigned long *p, unsigned long mask)
{
- return __atomic_fetch_andn((int *)p, __atomic_setup(p), mask).val;
+ return __atomic32_fetch_andn((int *)p, __atomic_setup(p), mask).val;
}
EXPORT_SYMBOL(_atomic_fetch_andn);
unsigned long _atomic_fetch_xor(volatile unsigned long *p, unsigned long mask)
{
- return __atomic_fetch_xor((int *)p, __atomic_setup(p), mask).val;
+ return __atomic32_fetch_xor((int *)p, __atomic_setup(p), mask).val;
}
EXPORT_SYMBOL(_atomic_fetch_xor);
diff --git a/arch/tile/lib/atomic_asm_32.S b/arch/tile/lib/atomic_asm_32.S
index 507abdd..1a70e6c 100644
--- a/arch/tile/lib/atomic_asm_32.S
+++ b/arch/tile/lib/atomic_asm_32.S
@@ -172,15 +172,20 @@ STD_ENTRY_SECTION(__atomic\name, .text.atomic)
.endif
.endm
-atomic_op _cmpxchg, 32, "seq r26, r22, r2; { bbns r26, 3f; move r24, r3 }"
-atomic_op _xchg, 32, "move r24, r2"
-atomic_op _xchg_add, 32, "add r24, r22, r2"
-atomic_op _xchg_add_unless, 32, \
+
+/*
+ * Use __atomic32 prefix to avoid collisions with GCC builtin __atomic
functions.
+ */
+
+atomic_op 32_cmpxchg, 32, "seq r26, r22, r2; { bbns r26, 3f; move r24, r3 }"
+atomic_op 32_xchg, 32, "move r24, r2"
+atomic_op 32_xchg_add, 32, "add r24, r22, r2"
+atomic_op 32_xchg_add_unless, 32, \
"sne r26, r22, r2; { bbns r26, 3f; add r24, r22, r3 }"
-atomic_op _fetch_or, 32, "or r24, r22, r2"
-atomic_op _fetch_and, 32, "and r24, r22, r2"
-atomic_op _fetch_andn, 32, "nor r2, r2, zero; and r24, r22, r2"
-atomic_op _fetch_xor, 32, "xor r24, r22, r2"
+atomic_op 32_fetch_or, 32, "or r24, r22, r2"
+atomic_op 32_fetch_and, 32, "and r24, r22, r2"
+atomic_op 32_fetch_andn, 32, "nor r2, r2, zero; and r24, r22, r2"
+atomic_op 32_fetch_xor, 32, "xor r24, r22, r2"
atomic_op 64_cmpxchg, 64, "{ seq r26, r22, r2; seq r27, r23, r3 }; \
{ bbns r26, 3f; move r24, r4 }; { bbns r27, 3f; move r25, r5 }"
