From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?=
 <emulatorman@parabola.nu>
Date: Thu, 20 Oct 2016 00:10:27 -0300
Subject: Linux-libre 4.8.2-gnu

---
 include/linux/thread_info.h | 60 +++++++++++++++++----------------------------
 1 file changed, 22 insertions(+), 38 deletions(-)

(limited to 'include/linux/thread_info.h')

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index b92944c55..2b5b10eed 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -57,9 +57,9 @@ extern long do_no_restart_syscall(struct restart_block *parm);
 
 #ifdef CONFIG_DEBUG_STACK_USAGE
 # define THREADINFO_GFP		(GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | \
-				 ___GFP_TOI_NOTRACK | __GFP_ZERO)
+				 __GFP_ZERO)
 #else
-# define THREADINFO_GFP		(GFP_KERNEL_ACCOUNT | ___GFP_TOI_NOTRACK | __GFP_NOTRACK)
+# define THREADINFO_GFP		(GFP_KERNEL_ACCOUNT | __GFP_NOTRACK)
 #endif
 
 /*
@@ -105,46 +105,30 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
 
 #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)
 
-#if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
-/*
- * An arch can define its own version of set_restore_sigmask() to get the
- * job done however works, with or without TIF_RESTORE_SIGMASK.
- */
-#define HAVE_SET_RESTORE_SIGMASK	1
-
-/**
- * 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.  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);
-	WARN_ON(!test_thread_flag(TIF_SIGPENDING));
-}
-static inline void clear_restore_sigmask(void)
+#ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES
+static inline int arch_within_stack_frames(const void * const stack,
+					   const void * const stackend,
+					   const void *obj, unsigned long len)
 {
-	clear_thread_flag(TIF_RESTORE_SIGMASK);
+	return 0;
 }
-static inline bool test_restore_sigmask(void)
-{
-	return test_thread_flag(TIF_RESTORE_SIGMASK);
-}
-static inline bool test_and_clear_restore_sigmask(void)
+#endif
+
+#ifdef CONFIG_HARDENED_USERCOPY
+extern void __check_object_size(const void *ptr, unsigned long n,
+					bool to_user);
+
+static __always_inline void check_object_size(const void *ptr, unsigned long n,
+					      bool to_user)
 {
-	return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK);
+	if (!__builtin_constant_p(n))
+		__check_object_size(ptr, n, to_user);
 }
-#endif	/* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
-
-#ifndef HAVE_SET_RESTORE_SIGMASK
-#error "no set_restore_sigmask() provided and default one won't work"
-#endif
+#else
+static inline void check_object_size(const void *ptr, unsigned long n,
+				     bool to_user)
+{ }
+#endif /* CONFIG_HARDENED_USERCOPY */
 
 #endif	/* __KERNEL__ */
 
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