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Subject: [tip: objtool/core] context_tracking: Fix KCSAN noinstr violation
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>, x86@kernel.org,
linux-kernel@vger.kernel.org
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[tip:,objtool/core] context_tracking: Fix KCSAN noinstr violation
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Commit Message
tip-bot2 for Thomas Gleixner
April 14, 2023, 2:47 p.m. UTC
The following commit has been merged into the objtool/core branch of tip: Commit-ID: e8deb00c0c4808654d1bf96a8f79cf1deb59b631 Gitweb: https://git.kernel.org/tip/e8deb00c0c4808654d1bf96a8f79cf1deb59b631 Author: Josh Poimboeuf <jpoimboe@kernel.org> AuthorDate: Wed, 12 Apr 2023 10:24:06 -07:00 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Fri, 14 Apr 2023 16:08:27 +02:00 context_tracking: Fix KCSAN noinstr violation With KCSAN enabled, even empty inline stubs can be out-of-lined. Force the context_tracking_guest_exit() stub inline. Fixes the following warnings: vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x1be: call to context_tracking_guest_exit() leaves .noinstr.text section vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0x85: call to context_tracking_guest_exit() leaves .noinstr.text section Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/dc93f45abdec90c171108b4b590b7fff5790963c.1681320026.git.jpoimboe@kernel.org --- include/linux/context_tracking.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index d4afa85..5ae3abd 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -97,7 +97,7 @@ static inline int exception_enter(void) { return 0; } static inline void exception_exit(enum ctx_state prev_ctx) { } static inline int ct_state(void) { return -1; } static __always_inline bool context_tracking_guest_enter(void) { return false; } -static inline void context_tracking_guest_exit(void) { } +static __always_inline void context_tracking_guest_exit(void) { } #define CT_WARN_ON(cond) do { } while (0) #endif /* !CONFIG_CONTEXT_TRACKING_USER */