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| author | Roland McGrath | 2005-05-27 00:21:13 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2005-05-27 01:16:16 +0200 |
| commit | d68b8622ccbee8a18e495ad1650c3306f2eeb0d6 (patch) | |
| tree | 7ec334394d78055de4d085c354c2931390c229f0 /include | |
| parent | Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/davem/ne... (diff) | |
| download | kernel-qcow2-linux-d68b8622ccbee8a18e495ad1650c3306f2eeb0d6.tar.gz kernel-qcow2-linux-d68b8622ccbee8a18e495ad1650c3306f2eeb0d6.tar.xz kernel-qcow2-linux-d68b8622ccbee8a18e495ad1650c3306f2eeb0d6.zip | |
[PATCH] i386: fix prevent_tail_call
We fixed this bug before, but it didn't take. It may have been the case
that the problem was first noticed to occur in a CONFIG_REGPARM compile.
But it's not regparm functions that need not to make tail calls, it's
asmlinkage functions called with a user pt_regs frame on the stack
supplying their arguments. prevent_tail_call probably doesn't do anything
at all in regparm functions (your argument registers are going to be
clobbered, period). It was a braino to conditionalize that definition in
the first place.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-i386/linkage.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/asm-i386/linkage.h b/include/asm-i386/linkage.h index af3d8571c5c7..f4a6ebac0247 100644 --- a/include/asm-i386/linkage.h +++ b/include/asm-i386/linkage.h @@ -5,9 +5,7 @@ #define FASTCALL(x) x __attribute__((regparm(3))) #define fastcall __attribute__((regparm(3))) -#ifdef CONFIG_REGPARM -# define prevent_tail_call(ret) __asm__ ("" : "=r" (ret) : "0" (ret)) -#endif +#define prevent_tail_call(ret) __asm__ ("" : "=r" (ret) : "0" (ret)) #ifdef CONFIG_X86_ALIGNMENT_16 #define __ALIGN .align 16,0x90 |