Andrey Ryabinin be3606ff73 x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y ... The kernel doesn't boot with both PROFILE_ANNOTATED_BRANCHES=y and KASAN=y options selected. With branch profiling enabled we end up calling ftrace_likely_update() before kasan_early_init(). ftrace_likely_update() is built with KASAN instrumentation, so calling it before kasan has been initialized leads to crash. Use DISABLE_BRANCH_PROFILING define to make sure that we don't call ftrace_likely_update() from early code before kasan_early_init(). Fixes: ef7f0d6a6c ("x86_64: add KASan support") Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: kasan-dev@googlegroups.com Cc: Alexander Potapenko <glider@google.com> Cc: stable@vger.kernel.org Cc: Andrew Morton <akpm@linux-foundation.org> Cc: lkp@01.org Cc: Dmitry Vyukov <dvyukov@google.com> Link: http://lkml.kernel.org/r/20170313163337.1704-1-aryabinin@virtuozzo.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2017-03-14 00:00:55 +01:00
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