Patch "Disable "maybe-uninitialized" warning globally" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

Disable "maybe-uninitialized" warning globally

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
disable-maybe-uninitialized-warning-globally.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Linus Torvalds <[email protected]>
Date: Wed, 27 Jul 2016 13:17:41 -0700
Subject: Disable "maybe-uninitialized" warning globally

From: Linus Torvalds <[email protected]>

commit 6e8d666e925333c55378e8d5540a8a9ee0eea9c5 upstream.

Several build configurations had already disabled this warning because it generates a lot of false positives. But some had not, and it was still enabled for "allmodconfig" builds, for example.

Looking at the warnings produced, every single one I looked at was a false positive, and the warnings are frequent enough (and big enough) that they can easily hide real problems that you don't notice in the noise generated by -Wmaybe-uninitialized.

The warning is good in theory, but this is a classic case of a warning that causes more problems than the warning can solve.

If gcc gets better at avoiding false positives, we may be able to re-enable this warning. But as is, we're better off without it, and I want to be able to see the *real* warnings.

---
 Makefile |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

@@ -368,7 +368,7 @@ AFLAGS_MODULE   =
 LDFLAGS_MODULE  =
 CFLAGS_KERNEL	=
 AFLAGS_KERNEL	=
-CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized
+CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage -fno-tree-loop-im
 
 
 # Use USERINCLUDE when you must reference the UAPI directories only.

@@ -616,12 +616,13 @@ ARCH_CFLAGS :=
 include arch/$(SRCARCH)/Makefile
 
 KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
+KBUILD_CFLAGS	+= $(call cc-disable-warning,maybe-uninitialized,)
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
+KBUILD_CFLAGS	+= -Os
 else
 ifdef CONFIG_PROFILE_ALL_BRANCHES
-KBUILD_CFLAGS	+= -O2 $(call cc-disable-warning,maybe-uninitialized,)
+KBUILD_CFLAGS	+= -O2
 else
 KBUILD_CFLAGS   += -O2
 endif

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/disable-maybe-uninitialized-warning-globally.patch queue-4.4/include-linux-kernel.h-change-abs-macro-so-it-uses-consistent-return-type.patch queue-4.4/makefile-mute-warning-for-__builtin_return_address-0-for-tracing-only.patch queue-4.4/add-braces-to-avoid-ambiguous-else-compiler-warnings.patch queue-4.4/ocfs2-fix-start-offset-to-ocfs2_zero_range_for_truncate.patch queue-4.4/tools-support-relative-directory-path-for-o.patch queue-4.4/disable-frame-address-warning.patch queue-4.4/ocfs2-dlm-fix-race-between-convert-and-migration.patch queue-4.4/reiserfs-fix-new_insert_key-may-be-used-uninitialized.patch