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hexagon: switch to generic sigaltstack

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-23 02:43:08 -05:00
parent 0aa0203fb4
commit 1e974c2166
2 changed files with 2 additions and 14 deletions
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1
arch/hexagon/Kconfig
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@ -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.

15
arch/hexagon/kernel/signal.c
View File

@ -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;