Commit 697e9c44 authored by Heiko Carstens's avatar Heiko Carstens Committed by Zefan Li

s390/process: fix sfpc inline assembly

commit e47994dd upstream.

The sfpc inline assembly within execve_tail() may incorrectly set bits
28-31 of the sfpc instruction to a value which is not zero.
These bits however are currently unused and therefore should be zero
so we won't get surprised if these bits will be used in the future.

Therefore remove the second operand from the inline assembly.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: default avatarZefan Li <lizefan@huawei.com>
parent eda27b22
...@@ -246,7 +246,7 @@ asmlinkage void execve_tail(void) ...@@ -246,7 +246,7 @@ asmlinkage void execve_tail(void)
{ {
current->thread.fp_regs.fpc = 0; current->thread.fp_regs.fpc = 0;
if (MACHINE_HAS_IEEE) if (MACHINE_HAS_IEEE)
asm volatile("sfpc %0,%0" : : "d" (0)); asm volatile("sfpc %0" : : "d" (0));
} }
/* /*
......
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