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Commit 36a45265 authored by Hiroshi Shimamoto's avatar Hiroshi Shimamoto Committed by Ingo Molnar
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x86: signal: use 16 bytes boundary for rt_sigframe 



Impact: cleanup

Supporting xsave/xrestore introduces 64 bytes boundary for save_i387_xstate().
16 bytes boundary is OK for rt_sigframe.

Signed-off-by: default avatarHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 97286a2b

arch/x86/kernel/signal.c

+2 −4
Original line number Diff line number Diff line
@@ -409,15 +409,13 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size, 
	if (used_math()) {

		sp -= sig_xstate_size;

		*fpstate = (void __user *)round_down(sp, 64);



		if (save_i387_xstate(*fpstate) < 0)

			return (void __user *) -1L;



		sp -= frame_size;

		return (void __user *)round_down(sp, 16) - 8;

	}



	sp -= frame_size;

	return (void __user *)round_down(sp, 64) - 8;

	return (void __user *)round_down(sp, 16) - 8;

}



static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,