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Commit 4d2947f7 authored by Paul Mundt's avatar Paul Mundt
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sh: Optimize the setup_rt_frame() I-cache flush. 



This only needs to flush the return code via the legacy path, and just
invalidates uselessly otherwise. This makes the behaviour consistent for
all of the trampoline setup paths.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent a66c2ede

arch/sh/kernel/signal_32.c

+1 −2
Original line number Diff line number Diff line
@@ -472,6 +472,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, 
		err |= __put_user(OR_R0_R0, &frame->retcode[6]);

		err |= __put_user((__NR_rt_sigreturn), &frame->retcode[7]);

		regs->pr = (unsigned long) frame->retcode;

		flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));

	}



	if (err)
@@ -497,8 +498,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, 
	pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",

		 current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);



	flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));



	return 0;



give_sigsegv: