4.19-stable patches

added patches:
	kernel-extable.c-use-address-of-operator-on-section-symbols.patch

diff --git a/queue-4.19/kernel-extable.c-use-address-of-operator-on-section-symbols.patch b/queue-4.19/kernel-extable.c-use-address-of-operator-on-section-symbols.patch
new file mode 100644 (file)
index 0000000..1c82ef8
--- /dev/null
+++ b/queue-4.19/kernel-extable.c-use-address-of-operator-on-section-symbols.patch
@@ -0,0 +1,46 @@
+From 63174f61dfaef58dc0e813eaf6602636794f8942 Mon Sep 17 00:00:00 2001
+From: Nathan Chancellor <natechancellor@gmail.com>
+Date: Mon, 6 Apr 2020 20:09:27 -0700
+Subject: kernel/extable.c: use address-of operator on section symbols
+
+From: Nathan Chancellor <natechancellor@gmail.com>
+
+commit 63174f61dfaef58dc0e813eaf6602636794f8942 upstream.
+
+Clang warns:
+
+../kernel/extable.c:37:52: warning: array comparison always evaluates to
+a constant [-Wtautological-compare]
+        if (main_extable_sort_needed && __stop___ex_table > __start___ex_table) {
+                                                          ^
+1 warning generated.
+
+These are not true arrays, they are linker defined symbols, which are just
+addresses.  Using the address of operator silences the warning and does
+not change the resulting assembly with either clang/ld.lld or gcc/ld
+(tested with diff + objdump -Dr).
+
+Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
+Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
+Link: https://github.com/ClangBuiltLinux/linux/issues/892
+Link: http://lkml.kernel.org/r/20200219202036.45702-1-natechancellor@gmail.com
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ kernel/extable.c |    3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/kernel/extable.c
++++ b/kernel/extable.c
+@@ -46,7 +46,8 @@ u32 __initdata __visible main_extable_so
+ /* Sort the kernel's built-in exception table */
+ void __init sort_main_extable(void)
+ {
+-      if (main_extable_sort_needed && __stop___ex_table > __start___ex_table) {
++      if (main_extable_sort_needed &&
++          &__stop___ex_table > &__start___ex_table) {
+               pr_notice("Sorting __ex_table...\n");
+               sort_extable(__start___ex_table, __stop___ex_table);
+       }

diff --git a/queue-4.19/series b/queue-4.19/series
index 2cf65edf303fd767852fa169114ad2e6bf48bbc5..5e58b090c9361b668f4103a19002e7d7a861276f 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -71,3 +71,4 @@ x86-boot-wrap-literal-addresses-in-absolute_pointer.patch
 acpi-thermal-drop-an-always-true-check.patch
 gcc-12-disable-wdangling-pointer-warning-for-now.patch
 eth-sun-cassini-remove-dead-code.patch
+kernel-extable.c-use-address-of-operator-on-section-symbols.patch