3.16.56-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Gleixner <t...@linutronix.de> commit b8b9ce4b5aec8de9e23cabb0a26b78641f9ab1d6 upstream. Remove the compile time warning when CONFIG_RETPOLINE=y and the compiler does not have retpoline support. Linus rationale for this is: It's wrong because it will just make people turn off RETPOLINE, and the asm updates - and return stack clearing - that are independent of the compiler are likely the most important parts because they are likely the ones easiest to target. And it's annoying because most people won't be able to do anything about it. The number of people building their own compiler? Very small. So if their distro hasn't got a compiler yet (and pretty much nobody does), the warning is just annoying crap. It is already properly reported as part of the sysfs interface. The compile-time warning only encourages bad things. Fixes: 76b043848fd2 ("x86/retpoline: Add initial retpoline support") Requested-by: Linus Torvalds <torva...@linux-foundation.org> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: David Woodhouse <d...@amazon.co.uk> Cc: Peter Zijlstra (Intel) <pet...@infradead.org> Cc: gno...@lxorguk.ukuu.org.uk Cc: Rik van Riel <r...@redhat.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: thomas.lenda...@amd.com Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Jiri Kosina <ji...@kernel.org> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Dave Hansen <dave.han...@intel.com> Cc: Kees Cook <keesc...@google.com> Cc: Tim Chen <tim.c.c...@linux.intel.com> Cc: Greg Kroah-Hartman <gre...@linux-foundation.org> Link: https://lkml.kernel.org/r/CA+55aFzWgquv4i6Mab6bASqYXg3ErV3XDFEYf=geccdqg5u...@mail.gmail.com Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- arch/x86/Makefile | 2 -- 1 file changed, 2 deletions(-) --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -182,8 +182,6 @@ ifdef CONFIG_RETPOLINE RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register) ifneq ($(RETPOLINE_CFLAGS),) KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) -DRETPOLINE - else - $(warning CONFIG_RETPOLINE=y, but not supported by the compiler. Toolchain update recommended.) endif endif