Nadav Amit f81f8ad56f x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs ... As described in: 77b0bf55bc: ("kbuild/Makefile: Prepare for using macros in inline assembly code to work around asm() related GCC inlining bugs") GCC's inlining heuristics are broken with common asm() patterns used in kernel code, resulting in the effective disabling of inlining. The workaround is to set an assembly macro and call it from the inline assembly block. As a result GCC considers the inline assembly block as a single instruction. (Which it isn't, but that's the best we can get.) This patch increases the kernel size: text data bss dec hex filename 18146889 10225380 2957312 31329581 1de0d2d ./vmlinux before 18147336 10226688 2957312 31331336 1de1408 ./vmlinux after (+1755) But enables more aggressive inlining (and probably better branch decisions). The number of static text symbols in vmlinux is much lower: Before: 40218 After: 40053 (-165) The assembly code gets harder to read due to the extra macro layer. [ mingo: Rewrote the changelog. ] Tested-by: Kees Cook <keescook@chromium.org> Signed-off-by: Nadav Amit <namit@vmware.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20181003213100.189959-7-namit@vmware.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2018-10-04 11:25:00 +02:00
..
acpi	ACPICA: Update version to 20180810	2018-08-14 23:49:13 +02:00
asm-generic	x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs	2018-10-04 11:25:00 +02:00
clocksource
crypto	crypto: scatterwalk - remove scatterwalk_samebuf()	2018-08-03 18:06:04 +08:00
drm	Revert "drm/panel: Add device_link from panel device to DRM device"	2018-09-27 11:00:42 -04:00
dt-bindings	ARM: SoC: late updates	2018-08-25 14:12:36 -07:00
keys
kvm	KVM: arm/arm64: vgic-v3: Add core support for Group0 SGIs	2018-08-12 12:06:34 +01:00
linux	x86/objtool: Use asm macros to work around GCC inlining bugs	2018-10-04 11:24:58 +02:00
math-emu
media	- New Drivers	2018-08-20 15:38:44 -07:00
memory
misc
net	NFC: Fix the number of pipes	2018-09-18 19:55:01 -07:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
ras
rdma	Second merge window update	2018-08-23 15:34:48 -07:00
scsi	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
soc
sound	ASoC: Fixes for v4.19	2018-09-17 18:59:21 +02:00
target	scsi: target: add session removal function	2018-08-02 15:29:31 -04:00
trace	Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2018-08-24 13:19:27 -07:00
uapi	Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name"	2018-09-25 13:28:58 +02:00
video	fbdev changes for v4.19:	2018-08-23 15:44:58 -07:00
xen	xen/balloon: add runtime control for scrubbing ballooned out pages	2018-09-14 08:51:10 -04:00