mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 18:53:52 +08:00
82ddcb0405
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>
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/* 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 */
|
|
/*
|
|
* 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.
|
|
*/
|
|
#define RELOC_HIDE(ptr, off) \
|
|
({ unsigned long __ptr; \
|
|
__asm__ ("" : "=r"(__ptr) : "0"(ptr)); \
|
|
(typeof(ptr)) (__ptr + (off)); })
|
|
|
|
|
|
#define inline inline __attribute__((always_inline))
|
|
#define __inline__ __inline__ __attribute__((always_inline))
|
|
#define __inline __inline __attribute__((always_inline))
|
|
#define __deprecated __attribute__((deprecated))
|
|
#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)))
|
|
#define noinline __attribute__((noinline))
|
|
#define __attribute_pure__ __attribute__((pure))
|
|
#define __attribute_const__ __attribute__((__const__))
|