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Message-Id: <f5aeb480783ee66b884a38de247d50094c3023fc.1436383168.git.luto@kernel.org> Date: Wed, 8 Jul 2015 12:24:00 -0700 From: Andy Lutomirski <luto@...nel.org> To: x86@...nel.org, linux-kernel@...r.kernel.org Cc: Frédéric Weisbecker <fweisbec@...il.com>, Rik van Riel <riel@...hat.com>, Oleg Nesterov <oleg@...hat.com>, Denys Vlasenko <vda.linux@...glemail.com>, Borislav Petkov <bp@...en8.de>, Kees Cook <keescook@...omium.org>, Brian Gerst <brgerst@...il.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Andy Lutomirski <luto@...nel.org> Subject: [RFC/PATCH 3/7] [TEMPORARY] x86/entry/32: Sanity check for work_notifysig 44fbbb3dc687c added an unnecessary check. Add a temporary assertion to confirm that it's unnecessary. Signed-off-by: Andy Lutomirski <luto@...nel.org> --- arch/x86/entry/entry_32.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index a36d5df6a749..d36afad80ad1 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -491,10 +491,13 @@ work_notifysig: # deal with pending signals and #endif TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) + /* Temporary sanity check */ movb PT_CS(%esp), %bl andb $SEGMENT_RPL_MASK, %bl cmpb $USER_RPL, %bl - jb resume_kernel + jnb 2f + ud2 +2: xorl %edx, %edx call do_notify_resume jmp resume_userspace -- 2.4.3 -- 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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