x86/entry/32: Fix entry_INT80_32() to expect interrupts to be on
authorAndy Lutomirski <luto@kernel.org>
Fri, 16 Oct 2015 22:42:54 +0000 (15:42 -0700)
committerIngo Molnar <mingo@kernel.org>
Sun, 18 Oct 2015 10:11:16 +0000 (12:11 +0200)
commit657c1eea0019e80685a84cbb1919794243a187c9
tree67eeeb89260f28257628ecbd7f8531ce63925d5b
parent612bece654ff6cd43160e201985be826e96b8bcb
x86/entry/32: Fix entry_INT80_32() to expect interrupts to be on

When I rewrote entry_INT80_32, I thought that int80 was an
interrupt gate.  It's a trap gate.  *facepalm*

Thanks to Brian Gerst for pointing out that it's better to
change the entry code than to change the gate type.

Suggested-by: Brian Gerst <brgerst@gmail.com>
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 150ac78d63af ("x86/entry/32: Switch INT80 to the new C syscall path")
Link: http://lkml.kernel.org/r/dc09d9b574a5c1dcca996847875c73f8341ce0ad.1445035014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/common.c
arch/x86/entry/entry_32.S
arch/x86/entry/entry_64_compat.S