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[PATCH] consistently use MAX_ERRNO in __syscall_return 

Consistently use MAX_ERRNO when checking for errors in __syscall_return().

[ralf@linux-mips.org: build fix]
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Randy Dunlap 2006-09-27 01:50:55 -07:00 committed by Linus Torvalds
parent bd8e39f9e4
commit ebba5f9fcb
14 changed files with 43 additions and 23 deletions
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3
include/asm-arm/unistd.h
View File

@ -377,6 +377,7 @@
#endif
#ifdef __KERNEL__
#include <linux/err.h>
#include <linux/linkage.h>
#define __sys2(x) #x
@ -396,7 +397,7 @@
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-129)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
errno = -(res); \
res = -1; \
} \

3
include/asm-arm26/unistd.h
View File

@ -311,6 +311,7 @@
#define __ARM_NR_usr26 (__ARM_NR_BASE+3)
#ifdef __KERNEL__
#include <linux/err.h>
#include <linux/linkage.h>
#define __sys2(x) #x
@ -322,7 +323,7 @@
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
if ((unsigned long)(res) >= (unsigned long)-MAX_ERRNO) { \
errno = -(res); \
res = -1; \
} \

3
include/asm-frv/unistd.h
View File

@ -320,6 +320,7 @@
#ifdef __KERNEL__
#define NR_syscalls 310
#include <linux/err.h>
/*
* process the return value of a syscall, consigning it to one of two possible fates
@ -329,7 +330,7 @@
#define __syscall_return(type, res) \
do { \
unsigned long __sr2 = (res); \
if (__builtin_expect(__sr2 >= (unsigned long)(-4095), 0)) { \
if (__builtin_expect(__sr2 >= (unsigned long)(-MAX_ERRNO), 0)) { \
errno = (-__sr2); \
__sr2 = ~0UL; \
} \

6
include/asm-h8300/unistd.h
View File

@ -295,14 +295,14 @@
#ifdef __KERNEL__
#define NR_syscalls 289
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -122: see
/* user-visible error numbers are in the range -1 - -MAX_ERRNO: see
<asm-m68k/errno.h> */
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
/* avoid using res which is declared to be in register d0; \
errno might expand to a function call and clobber it. */ \
int __err = -(res); \

5
include/asm-i386/unistd.h
View File

@ -328,14 +328,15 @@
#ifdef __KERNEL__
#define NR_syscalls 319
#include <linux/err.h>
/*
* user-visible error numbers are in the range -1 - -128: see
* user-visible error numbers are in the range -1 - -MAX_ERRNO: see
* <asm-i386/errno.h>
*/
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-(128 + 1))) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
errno = -(res); \
res = -1; \
} \

5
include/asm-m32r/unistd.h
View File

@ -296,8 +296,9 @@
#ifdef __KERNEL__
#define NR_syscalls 285
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -124: see
/* user-visible error numbers are in the range -1 - -MAX_ERRNO: see
* <asm-m32r/errno.h>
*/
@ -305,7 +306,7 @@
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-(124 + 1))) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
/* Avoid using "res" which is declared to be in register r0; \
errno might expand to a function call and clobber it. */ \
int __err = -(res); \

5
include/asm-m68k/unistd.h
View File

@ -288,13 +288,14 @@
#ifdef __KERNEL__
#define NR_syscalls 282
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -124: see
/* user-visible error numbers are in the range -1 - -MAX_ERRNO: see
<asm-m68k/errno.h> */
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
/* avoid using res which is declared to be in register d0; \
errno might expand to a function call and clobber it. */ \
int __err = -(res); \

5
include/asm-m68knommu/unistd.h
View File

@ -289,13 +289,14 @@
#ifdef __KERNEL__
#define NR_syscalls 282
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -122: see
/* user-visible error numbers are in the range -1 - -MAX_ERRNO: see
<asm-m68k/errno.h> */
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
/* avoid using res which is declared to be in register d0; \
errno might expand to a function call and clobber it. */ \
int __err = -(res); \

4
include/asm-s390/unistd.h
View File

@ -342,9 +342,11 @@
#ifdef __KERNEL__
#include <linux/err.h>
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-4095)) {\
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
errno = -(res); \
res = -1; \
} \

7
include/asm-sh/unistd.h
View File

@ -306,11 +306,14 @@
#ifdef __KERNEL__
/* user-visible error numbers are in the range -1 - -124: see <asm-sh/errno.h> */
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -MAX_ERRNO:
* see <asm-sh/errno.h> */
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-124)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
/* Avoid using "res" which is declared to be in register r0; \
errno might expand to a function call and clobber it. */ \
int __err = -(res); \

6
include/asm-sh64/unistd.h
View File

@ -347,8 +347,10 @@
#ifdef __KERNEL__
#define NR_syscalls 321
#include <linux/err.h>
/* user-visible error numbers are in the range -1 - -125: see <asm-sh64/errno.h> */
/* user-visible error numbers are in the range -1 - -MAX_ERRNO:
* see <asm-sh64/errno.h> */
#define __syscall_return(type, res) \
do { \
@ -358,7 +360,7 @@ do { \
** life easier in the system call epilogue (see entry.S) \
*/ \
register unsigned long __sr2 __asm__ ("r2") = res; \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
errno = -(res); \
__sr2 = -1; \
} \

5
include/asm-v850/unistd.h
View File

@ -238,12 +238,13 @@
#ifdef __KERNEL__
#include <asm/clinkage.h>
#include <linux/err.h>
#define __syscall_return(type, res) \
do { \
/* user-visible error numbers are in the range -1 - -124: \
/* user-visible error numbers are in the range -1 - -MAX_ERRNO: \
see <asm-v850/errno.h> */ \
if (__builtin_expect ((unsigned long)(res) >= (unsigned long)(-125), 0)) { \
if (__builtin_expect ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO), 0)) { \
errno = -(res); \
res = -1; \
} \

5
include/asm-x86_64/unistd.h
View File

@ -623,16 +623,17 @@ __SYSCALL(__NR_move_pages, sys_move_pages)
#ifdef __KERNEL__
#define __NR_syscall_max __NR_move_pages
#include <linux/err.h>
#ifndef __NO_STUBS
/* user-visible error numbers are in the range -1 - -4095 */
/* user-visible error numbers are in the range -1 - -MAX_ERRNO */
#define __syscall_clobber "r11","rcx","memory"
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-127)) { \
if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) { \
errno = -(res); \
res = -1; \
} \

4
include/linux/err.h
View File

@ -15,6 +15,8 @@
*/
#define MAX_ERRNO 4095
#ifndef __ASSEMBLY__
#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
static inline void *ERR_PTR(long error)
@ -32,4 +34,6 @@ static inline long IS_ERR(const void *ptr)
return IS_ERR_VALUE((unsigned long)ptr);
}
#endif
#endif /* _LINUX_ERR_H */