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Date: Tue, 6 Oct 2015 14:29:38 +0200 From: Jiri Slaby <jslaby@...e.cz> To: Ingo Molnar <mingo@...hat.com> Cc: linux-kernel@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org Subject: [PATCH 2/2] x86: text_poke, check if text_mutex is held This is required by the function, su use lockdep (if available) to check the dependency. Signed-off-by: Jiri Slaby <jslaby@...e.cz> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Ingo Molnar <mingo@...hat.com> Cc: "H. Peter Anvin" <hpa@...or.com> Cc: x86@...nel.org --- arch/x86/kernel/alternative.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 25f909362b7a..3985c2517a93 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -693,6 +693,8 @@ void *text_poke(void *addr, const void *opcode, size_t len) struct page *pages[2]; int i; + lockdep_assert_held(&text_mutex); + if (!core_kernel_text((unsigned long)addr)) { pages[0] = vmalloc_to_page(addr); pages[1] = vmalloc_to_page(addr + PAGE_SIZE); -- 2.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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