d68b8622cc
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>
15 lines
391 B
C
15 lines
391 B
C
#ifndef __ASM_LINKAGE_H
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#define __ASM_LINKAGE_H
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#define asmlinkage CPP_ASMLINKAGE __attribute__((regparm(0)))
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#define FASTCALL(x) x __attribute__((regparm(3)))
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#define fastcall __attribute__((regparm(3)))
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#define prevent_tail_call(ret) __asm__ ("" : "=r" (ret) : "0" (ret))
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#ifdef CONFIG_X86_ALIGNMENT_16
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#define __ALIGN .align 16,0x90
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#define __ALIGN_STR ".align 16,0x90"
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#endif
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#endif
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