From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 24 Apr 2012 06:37:07 +0000 (-0400)
Subject: um: add TIF_NOTIFY_RESUME
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d50349b0c397407458ea8c57aee765d158e6f9ee;p=openwrt%2Fstaging%2Fblogic.git

um: add TIF_NOTIFY_RESUME

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h
index 200c4ab1240c..6d85ebb860fd 100644
--- a/arch/um/include/asm/thread_info.h
+++ b/arch/um/include/asm/thread_info.h
@@ -71,6 +71,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_MEMDIE		5	/* is terminating due to OOM killer */
 #define TIF_SYSCALL_AUDIT	6
 #define TIF_RESTORE_SIGMASK	7
+#define TIF_NOTIFY_RESUME	8
 
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 2b73dedb44ca..4d9af3172d9f 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -18,6 +18,7 @@
 #include <linux/seq_file.h>
 #include <linux/tick.h>
 #include <linux/threads.h>
+#include <linux/tracehook.h>
 #include <asm/current.h>
 #include <asm/pgtable.h>
 #include <asm/mmu_context.h>
@@ -114,8 +115,13 @@ void interrupt_end(void)
 {
 	if (need_resched())
 		schedule();
-	if (test_tsk_thread_flag(current, TIF_SIGPENDING))
+	if (test_thread_flag(TIF_SIGPENDING))
 		do_signal();
+	if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
+		tracehook_notify_resume(&current->thread.regs);
+		if (current->replacement_session_keyring)
+			key_replace_session_keyring();
+	}
 }
 
 void exit_thread(void)