Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2018df76d276bb4fe97b175bd5db0cdd128dfeb4
Commit: 2018df76d276bb4fe97b175bd5db0cdd128dfeb4
Parent: a3ebdb6c423dff420168a3faf25c76e9e5f59258
Author: Shi Weihua <[EMAIL PROTECTED]>
AuthorDate: Thu Dec 13 15:58:26 2007 -0800
Committer: Tony Luck <[EMAIL PROTECTED]>
CommitDate: Tue Dec 18 16:55:15 2007 -0800
[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 <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Tony Luck <[EMAIL PROTECTED]>
---
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 */
-
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