forked from Minki/linux
[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>
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a3ebdb6c42
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2018df76d2
@ -280,15 +280,7 @@ setup_sigcontext (struct sigcontext __user *sc, sigset_t *mask, struct sigscratc
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err |= __copy_to_user(&sc->sc_gr[15], &scr->pt.r15, 8); /* r15 */
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err |= __put_user(scr->pt.cr_iip + ia64_psr(&scr->pt)->ri, &sc->sc_ip);
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if (flags & IA64_SC_FLAG_IN_SYSCALL) {
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/* Clear scratch registers if the signal interrupted a system call. */
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err |= __put_user(0, &sc->sc_ar_ccv); /* ar.ccv */
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err |= __put_user(0, &sc->sc_br[7]); /* b7 */
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err |= __put_user(0, &sc->sc_gr[14]); /* r14 */
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err |= __clear_user(&sc->sc_ar25, 2*8); /* ar.csd & ar.ssd */
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err |= __clear_user(&sc->sc_gr[2], 2*8); /* r2-r3 */
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err |= __clear_user(&sc->sc_gr[16], 16*8); /* r16-r31 */
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} else {
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if (!(flags & IA64_SC_FLAG_IN_SYSCALL)) {
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/* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */
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err |= __put_user(scr->pt.ar_ccv, &sc->sc_ar_ccv); /* ar.ccv */
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err |= __put_user(scr->pt.b7, &sc->sc_br[7]); /* b7 */
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