2005-04-17 00:20:36 +02:00
|
|
|
/* Never include this file directly. Include <linux/compiler.h> instead. */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Common definitions for all gcc versions go here.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/* Optimization barrier */
|
|
|
|
/* The "volatile" is due to gcc bugs */
|
|
|
|
#define barrier() __asm__ __volatile__("": : :"memory")
|
|
|
|
|
|
|
|
/* This macro obfuscates arithmetic on a variable address so that gcc
|
|
|
|
shouldn't recognize the original var, and make assumptions about it */
|
2006-01-10 08:21:20 +01:00
|
|
|
/*
|
|
|
|
* Versions of the ppc64 compiler before 4.1 had a bug where use of
|
|
|
|
* RELOC_HIDE could trash r30. The bug can be worked around by changing
|
|
|
|
* the inline assembly constraint from =g to =r, in this particular
|
|
|
|
* case either is valid.
|
|
|
|
*/
|
2005-04-17 00:20:36 +02:00
|
|
|
#define RELOC_HIDE(ptr, off) \
|
|
|
|
({ unsigned long __ptr; \
|
2006-01-10 08:21:20 +01:00
|
|
|
__asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
|
2005-04-17 00:20:36 +02:00
|
|
|
(typeof(ptr)) (__ptr + (off)); })
|
2006-01-08 10:04:09 +01:00
|
|
|
|
2007-05-06 23:51:05 +02:00
|
|
|
/* &a[0] degrades to a pointer: a different type from an array */
|
|
|
|
#define __must_be_array(a) \
|
|
|
|
BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
|
2006-01-08 10:04:09 +01:00
|
|
|
|
|
|
|
#define inline inline __attribute__((always_inline))
|
|
|
|
#define __inline__ __inline__ __attribute__((always_inline))
|
|
|
|
#define __inline __inline __attribute__((always_inline))
|
|
|
|
#define __deprecated __attribute__((deprecated))
|
[PATCH] extend the set of "__attribute__" shortcut macros
Extend the set of "__attribute__" shortcut macros, and remove identical
(and now superfluous) definitions from a couple of source files.
based on a page at robert love's blog:
http://rlove.org/log/2005102601
extend the set of shortcut macros defined in compiler-gcc.h with the
following:
#define __packed __attribute__((packed))
#define __weak __attribute__((weak))
#define __naked __attribute__((naked))
#define __noreturn __attribute__((noreturn))
#define __pure __attribute__((pure))
#define __aligned(x) __attribute__((aligned(x)))
#define __printf(a,b) __attribute__((format(printf,a,b)))
Once these are in place, it's up to subsystem maintainers to decide if they
want to take advantage of them. there is already a strong precedent for
using shortcuts like this in the source tree.
The ones that might give people pause are "__aligned" and "__printf", but
shortcuts for both of those are already in use, and in some ways very
confusingly. note the two very different definitions for a macro named
"ALIGNED":
drivers/net/sgiseeq.c:#define ALIGNED(x) ((((unsigned long)(x)) + 0xf) & ~(0xf))
drivers/scsi/ultrastor.c:#define ALIGNED(x) __attribute__((aligned(x)))
also:
include/acpi/platform/acgcc.h:
#define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
Given the precedent, then, it seems logical to at least standardize on a
consistent set of these macros.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-10 10:46:20 +01:00
|
|
|
#define __packed __attribute__((packed))
|
|
|
|
#define __weak __attribute__((weak))
|
|
|
|
#define __naked __attribute__((naked))
|
|
|
|
#define __noreturn __attribute__((noreturn))
|
|
|
|
#define __pure __attribute__((pure))
|
|
|
|
#define __aligned(x) __attribute__((aligned(x)))
|
|
|
|
#define __printf(a,b) __attribute__((format(printf,a,b)))
|
2006-01-08 10:04:09 +01:00
|
|
|
#define noinline __attribute__((noinline))
|
|
|
|
#define __attribute_pure__ __attribute__((pure))
|
|
|
|
#define __attribute_const__ __attribute__((__const__))
|