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Commit 1e974c21 authored by Al Viro's avatar Al Viro
Browse files

hexagon: switch to generic sigaltstack 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 0aa0203f

arch/hexagon/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ config HEXAGON 
	select GENERIC_CLOCKEVENTS

	select GENERIC_CLOCKEVENTS_BROADCAST

	select MODULES_USE_ELF_RELA

	select GENERIC_SIGALTSTACK

	---help---

	  Qualcomm Hexagon is a processor architecture designed for high

	  performance and low power across a wide variety of applications.

arch/hexagon/kernel/signal.c

+1 −14
Original line number Diff line number Diff line
@@ -247,12 +247,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) 
/*

 * Architecture-specific wrappers for signal-related system calls

 */

asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)

{

	struct pt_regs *regs = current_pt_regs();



	return do_sigaltstack(uss, uoss, regs->r29);

}



asmlinkage int sys_rt_sigreturn(void)

{
@@ -288,14 +282,7 @@ asmlinkage int sys_rt_sigreturn(void) 
	 */

	regs->syscall_nr = __NR_rt_sigreturn;



	/*

	 * If we were meticulous, we'd only call this if we knew that

	 * we were actually going to use an alternate stack, and we'd

	 * consider any error to be fatal.  What we do here, in common

	 * with many other architectures, is call it blindly and only

	 * consider the -EFAULT return case to be proof of a problem.

	 */

	if (do_sigaltstack(&frame->uc.uc_stack, NULL, pt_psp(regs)) == -EFAULT)

	if (restore_altstack(&frame->uc.uc_stack))

		goto badframe;



	return 0;