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| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2013-05-13 16:16:42 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-14 16:00:20 +1000 |
| commit | 106ed886abc46723c290e82e5f161d9b40820203 (patch) | |
| tree | 70fd4f2b40bea53c0bf1d8bfa2bf133870f371a6 /arch/powerpc | |
| parent | ba12eedee321eeb5baecaada285daeb3462c35f5 (diff) | |
| download | lwn-106ed886abc46723c290e82e5f161d9b40820203.tar.gz lwn-106ed886abc46723c290e82e5f161d9b40820203.zip | |
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 edf55fda35c7dc7f2d9241c3abaddaf759b457c6
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/signal.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index cf12eae02de5..d63b5024c563 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -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(); } |