locking/atomic: cmpxchg: make `generic` a prefix

The asm-generic implementations of cmpxchg_local() and cmpxchg64_local()
use a `_generic` suffix to distinguish themselves from arch code or
wrappers used elsewhere.

Subsequent patches will add ARCH_ATOMIC support to these
implementations, and will distinguish more functions with a `generic`
portion. To align with how ARCH_ATOMIC uses an `arch_` prefix, it would
be helpful to use a `generic_` prefix rather than a `_generic` suffix.

In preparation for this, this patch renames the existing functions to
make `generic` a prefix rather than a suffix. There should be no
functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-12-mark.rutland@arm.com

arch/arm/include/asm/cmpxchg.h

@@ -135,13 +135,13 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
  * them available.
  */
 #define cmpxchg_local(ptr, o, n) ({					\
-	(__typeof(*ptr))__cmpxchg_local_generic((ptr),			\
+	(__typeof(*ptr))__generic_cmpxchg_local((ptr),			\
 					        (unsigned long)(o),	\
 					        (unsigned long)(n),	\
 					        sizeof(*(ptr)));	\
 })
 
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 
 #include <asm-generic/cmpxchg.h>
 
@@ -224,7 +224,7 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
 #ifdef CONFIG_CPU_V6	/* min ARCH == ARMv6 */
 	case 1:
 	case 2:
-		ret = __cmpxchg_local_generic(ptr, old, new, size);
+		ret = __generic_cmpxchg_local(ptr, old, new, size);
 		break;
 #endif
 	default:

arch/m68k/include/asm/cmpxchg.h

@@ -80,7 +80,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz
 
 #include <asm-generic/cmpxchg-local.h>
 
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 
 extern unsigned long __invalid_cmpxchg_size(volatile void *,
 					    unsigned long, unsigned long, int);

arch/mips/include/asm/cmpxchg.h

@@ -222,7 +222,7 @@ unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 #else
 
 # include <asm-generic/cmpxchg-local.h>
-# define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+# define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 
 # ifdef CONFIG_SMP
 

arch/parisc/include/asm/cmpxchg.h

@@ -98,7 +98,7 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
 #endif
 	case 4:	return __cmpxchg_u32(ptr, old, new_);
 	default:
-		return __cmpxchg_local_generic(ptr, old, new_, size);
+		return __generic_cmpxchg_local(ptr, old, new_, size);
 	}
 }
 
@@ -116,7 +116,7 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
 	cmpxchg_local((ptr), (o), (n));					\
 })
 #else
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 #endif
 
 #define cmpxchg64(ptr, o, n) __cmpxchg_u64(ptr, o, n)

arch/powerpc/include/asm/cmpxchg.h

@@ -524,7 +524,7 @@ __cmpxchg_acquire(void *ptr, unsigned long old, unsigned long new,
 })
 #else
 #include <asm-generic/cmpxchg-local.h>
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 #endif
 
 #endif /* __KERNEL__ */

arch/sparc/include/asm/cmpxchg_32.h

@@ -73,8 +73,8 @@ u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new);
  * them available.
  */
 #define cmpxchg_local(ptr, o, n)				  	       \
-	((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+	((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o),\
 			(unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 
 #endif /* __ARCH_SPARC_CMPXCHG__ */

arch/sparc/include/asm/cmpxchg_64.h

@@ -189,7 +189,7 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
 	case 4:
 	case 8:	return __cmpxchg(ptr, old, new, size);
 	default:
-		return __cmpxchg_local_generic(ptr, old, new, size);
+		return __generic_cmpxchg_local(ptr, old, new, size);
 	}
 
 	return old;

arch/xtensa/include/asm/cmpxchg.h

@@ -97,7 +97,7 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
 	case 4:
 		return __cmpxchg_u32(ptr, old, new);
 	default:
-		return __cmpxchg_local_generic(ptr, old, new, size);
+		return __generic_cmpxchg_local(ptr, old, new, size);
 	}
 
 	return old;
@@ -108,9 +108,9 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr,
  * them available.
  */
 #define cmpxchg_local(ptr, o, n)				  	       \
-	((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+	((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o),\
 			(unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 #define cmpxchg64(ptr, o, n)    cmpxchg64_local((ptr), (o), (n))
 
 /*

include/asm-generic/cmpxchg-local.h

@@ -12,7 +12,7 @@ extern unsigned long wrong_size_cmpxchg(volatile void *ptr)
  * Generic version of __cmpxchg_local (disables interrupts). Takes an unsigned
  * long parameter, supporting various types of architectures.
  */
-static inline unsigned long __cmpxchg_local_generic(volatile void *ptr,
+static inline unsigned long __generic_cmpxchg_local(volatile void *ptr,
 		unsigned long old, unsigned long new, int size)
 {
 	unsigned long flags, prev;
@@ -51,7 +51,7 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr,
 /*
  * Generic version of __cmpxchg64_local. Takes an u64 parameter.
  */
-static inline u64 __cmpxchg64_local_generic(volatile void *ptr,
+static inline u64 __generic_cmpxchg64_local(volatile void *ptr,
 		u64 old, u64 new)
 {
 	u64 prev;

include/asm-generic/cmpxchg.h

@@ -94,13 +94,13 @@ unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
 
 #ifndef cmpxchg_local
 #define cmpxchg_local(ptr, o, n) ({					       \
-	((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+	((__typeof__(*(ptr)))__generic_cmpxchg_local((ptr), (unsigned long)(o),\
 			(unsigned long)(n), sizeof(*(ptr))));		       \
 })
 #endif
 
 #ifndef cmpxchg64_local
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64_local(ptr, o, n) __generic_cmpxchg64_local((ptr), (o), (n))
 #endif
 
 #define cmpxchg(ptr, o, n)	cmpxchg_local((ptr), (o), (n))