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Commit 106ed886 authored by Li Zhong's avatar Li Zhong Committed by Benjamin Herrenschmidt
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powerpc: Exit user context on notify resume 



This patch allows RCU usage in do_notify_resume, e.g. signal handling.
It corresponds to
[PATCH] x86: Exit RCU extended QS on notify resume
  commit edf55fda

Signed-off-by: default avatarLi Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent ba12eede

arch/powerpc/kernel/signal.c

+5 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/signal.h>

#include <linux/uprobes.h>

#include <linux/key.h>

#include <linux/context_tracking.h>

#include <asm/hw_breakpoint.h>

#include <asm/uaccess.h>

#include <asm/unistd.h>
@@ -159,6 +160,8 @@ static int do_signal(struct pt_regs *regs) 


void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)

{

	user_exit();



	if (thread_info_flags & _TIF_UPROBE)

		uprobe_notify_resume(regs);
@@ -169,4 +172,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) 
		clear_thread_flag(TIF_NOTIFY_RESUME);

		tracehook_notify_resume(regs);

	}



	user_enter();

}