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| author | Shi Weihua <shiwh@cn.fujitsu.com> | 2007-12-13 15:58:26 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-12-18 16:55:15 -0800 |
| commit | 2018df76d276bb4fe97b175bd5db0cdd128dfeb4 (patch) | |
| tree | f0b89e3d0be3ef7b6dce37370e7be10da76e952e /arch/ia64 | |
| parent | a3ebdb6c423dff420168a3faf25c76e9e5f59258 (diff) | |
| download | op-kernel-dev-2018df76d276bb4fe97b175bd5db0cdd128dfeb4.zip op-kernel-dev-2018df76d276bb4fe97b175bd5db0cdd128dfeb4.tar.gz | |
[IA64] signal: remove redundant code in setup_sigcontext()
This patch removes some redundant code in the function setup_sigcontext().
The registers ar.ccv,b7,r14,ar.csd,ar.ssd,r2-r3 and r16-r31 are not
restored in restore_sigcontext() when (flags & IA64_SC_FLAG_IN_SYSCALL) is
true. So we don't need to zero those variables in setup_sigcontext().
Signed-off-by: Shi Weihua <shiwh@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/kernel/signal.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c index 4c73009..309da35 100644 --- a/arch/ia64/kernel/signal.c +++ b/arch/ia64/kernel/signal.c @@ -280,15 +280,7 @@ setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratc err |= __copy_to_user(&sc->sc_gr[15], &scr->pt.r15, 8); /* r15 */ err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip); - if (flags & IA64_SC_FLAG_IN_SYSCALL) { - /* Clear scratch registers if the signal interrupted a system call. */ - err |= __put_user(0, &sc->sc_ar_ccv); /* ar.ccv */ - err |= __put_user(0, &sc->sc_br[7]); /* b7 */ - err |= __put_user(0, &sc->sc_gr[14]); /* r14 */ - err |= __clear_user(&sc->sc_ar25, 2*8); /* ar.csd & ar.ssd */ - err |= __clear_user(&sc->sc_gr[2], 2*8); /* r2-r3 */ - err |= __clear_user(&sc->sc_gr[16], 16*8); /* r16-r31 */ - } else { + if (!(flags & IA64_SC_FLAG_IN_SYSCALL)) { /* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */ err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */ err |= __put_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */ |
