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.mukherjee@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 1af5de9af138 ("locking/atomic, arch/tile: Implement atomic{,64}_fetch_{add,sub,and,or,xor}()")
Link: http://lkml.kernel.org/r/20160622091649.GB30154@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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 da8eb4ed3752..a93774255136 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 1a6ef1b69cb1..e64a1b75fc38 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 5b6bd932c9c7..f8128800dbf5 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 507abdd2bf9a..1a70e6c0f259 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 }"