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[PATCH] extend the set of "__attribute__" shortcut macros

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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>
This commit is contained in:
Robert P. J. Day 2007-02-10 01:46:20 -08:00 committed by Linus Torvalds
parent e3e8a75d2a
commit 82ddcb0405
4 changed files with 7 additions and 6 deletions
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2
arch/mips/mm/cache.c
View File

@ -107,8 +107,6 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address,
}
}
#define __weak __attribute__((weak))
static char cache_panic[] __initdata = "Yeee, unsupported cache architecture.";
void __init cpu_cache_init(void)

2
fs/hfs/hfs.h
View File

@ -83,8 +83,6 @@
/*======== HFS structures as they appear on the disk ========*/
#define __packed __attribute__ ((packed))
/* Pascal-style string of up to 31 characters */
struct hfs_name {
u8 len;

2
fs/hfsplus/hfsplus_raw.h
View File

@ -15,8 +15,6 @@
#include <linux/types.h>
#define __packed __attribute__ ((packed))
/* Some constants */
#define HFSPLUS_SECTOR_SIZE 512
#define HFSPLUS_SECTOR_SHIFT 9

7
include/linux/compiler-gcc.h
View File

@ -27,6 +27,13 @@
#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__))