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-rw-r--r--include/linux/thread_info.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index 43d8162c696e..81c5f82f0663 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -97,11 +97,17 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
* set_restore_sigmask() - make sure saved_sigmask processing gets done
*
* This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
- * will run before returning to user mode, to process the flag.
+ * will run before returning to user mode, to process the flag. For
+ * all callers, TIF_SIGPENDING is already set or it's no harm to set
+ * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
+ * arch code will notice on return to user mode, in case those bits
+ * are scarce. We set TIF_SIGPENDING here to ensure that the arch
+ * signal code always gets run when TIF_RESTORE_SIGMASK is set.
*/
static inline void set_restore_sigmask(void)
{
set_thread_flag(TIF_RESTORE_SIGMASK);
+ set_thread_flag(TIF_SIGPENDING);
}
#endif /* TIF_RESTORE_SIGMASK */