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Subjectmainline/master boot bisection: v5.3-12562-g7897c04ad09f on bcm2836-rpi-2-b
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mainline/master boot bisection: v5.3-12562-g7897c04ad09f on bcm2836-rpi-2-b

Summary:
Start: 7897c04ad09f Merge tag 'trace-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Details: https://kernelci.org/boot/id/5d8d446459b51415c1f1224d
Plain log: https://storage.kernelci.org//mainline/master/v5.3-12562-g7897c04ad09f/arm/bcm2835_defconfig/gcc-8/lab-collabora/boot-bcm2836-rpi-2-b.txt
HTML log: https://storage.kernelci.org//mainline/master/v5.3-12562-g7897c04ad09f/arm/bcm2835_defconfig/gcc-8/lab-collabora/boot-bcm2836-rpi-2-b.html
Result: ac7c3e4ff401 compiler: enable CONFIG_OPTIMIZE_INLINING forcibly

Checks:
revert: PASS
verify: PASS

Parameters:
Tree: mainline
URL: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Branch: master
Target: bcm2836-rpi-2-b
CPU arch: arm
Lab: lab-collabora
Compiler: gcc-8
Config: bcm2835_defconfig
Test suite: boot

Breaking commit found:

-------------------------------------------------------------------------------
commit ac7c3e4ff401b304489a031938dbeaab585bfe0a
Author: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Wed Sep 25 16:47:42 2019 -0700

compiler: enable CONFIG_OPTIMIZE_INLINING forcibly

Commit 9012d011660e ("compiler: allow all arches to enable
CONFIG_OPTIMIZE_INLINING") allowed all architectures to enable this
option. A couple of build errors were reported by randconfig, but all of
them have been ironed out.

Towards the goal of removing CONFIG_OPTIMIZE_INLINING entirely (and it
will simplify the 'inline' macro in compiler_types.h), this commit changes
it to always-on option. Going forward, the compiler will always be
allowed to not inline functions marked 'inline'.

This is not a problem for x86 since it has been long used by
arch/x86/configs/{x86_64,i386}_defconfig.

I am keeping the config option just in case any problem crops up for other
architectures.

The code clean-up will be done after confirming this is solid.

Link: http://lkml.kernel.org/r/20190830034304.24259-1-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 6b1b1703a646..93d97f9b0157 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -311,7 +311,7 @@ config HEADERS_CHECK
relevant for userspace, say 'Y'.

config OPTIMIZE_INLINING
- bool "Allow compiler to uninline functions marked 'inline'"
+ def_bool y
help
This option determines if the kernel forces gcc to inline the functions
developers have marked 'inline'. Doing so takes away freedom from gcc to
@@ -322,8 +322,6 @@ config OPTIMIZE_INLINING
decision will become the default in the future. Until then this option
is there to test gcc for this.

- If unsure, say N.
-
config DEBUG_SECTION_MISMATCH
bool "Enable full Section mismatch analysis"
help
-------------------------------------------------------------------------------

Git bisection log:

-------------------------------------------------------------------------------
git bisect start
# good: [f41def397161053eb0d3ed6861ef65985efbf293] Merge tag 'ceph-for-5.4-rc1' of git://github.com/ceph/ceph-client
git bisect good f41def397161053eb0d3ed6861ef65985efbf293
# bad: [7897c04ad09f815aea1f2dbb05825887d4494a74] Merge tag 'trace-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
git bisect bad 7897c04ad09f815aea1f2dbb05825887d4494a74
# bad: [ec56103e18c7590303c69329dd4aaadf8a898c19] Merge tag 'for-linus-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
git bisect bad ec56103e18c7590303c69329dd4aaadf8a898c19
# bad: [da036ae147624b70f7d3784ff3a53bd4fda20d2a] scripts/gdb: handle split debug
git bisect bad da036ae147624b70f7d3784ff3a53bd4fda20d2a
# good: [5a7f4455ad321400e1361ab94fd6858c5b2fe0cf] checkpatch: remove obsolete period from "ambiguous SHA1" query
git bisect good 5a7f4455ad321400e1361ab94fd6858c5b2fe0cf
# good: [3e9fd5a48cb7b0ef93be097c2c1066738d37f5b7] fs/reiserfs/journal.c: remove set but not used variable
git bisect good 3e9fd5a48cb7b0ef93be097c2c1066738d37f5b7
# good: [7c3a6aedcd6aae0a32a527e68669f7dd667492d1] kexec: bail out upon SIGKILL when allocating memory.
git bisect good 7c3a6aedcd6aae0a32a527e68669f7dd667492d1
# good: [9dd819a15162f8f82a6001b090caa38c18297b39] uaccess: add missing __must_check attributes
git bisect good 9dd819a15162f8f82a6001b090caa38c18297b39
# bad: [7d92bda271ddcbb2d1be2f82733dcb9bf8378010] kgdb: don't use a notifier to enter kgdb at panic; call directly
git bisect bad 7d92bda271ddcbb2d1be2f82733dcb9bf8378010
# bad: [ac7c3e4ff401b304489a031938dbeaab585bfe0a] compiler: enable CONFIG_OPTIMIZE_INLINING forcibly
git bisect bad ac7c3e4ff401b304489a031938dbeaab585bfe0a
# first bad commit: [ac7c3e4ff401b304489a031938dbeaab585bfe0a] compiler: enable CONFIG_OPTIMIZE_INLINING forcibly
-------------------------------------------------------------------------------
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