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| author | Andy Lutomirski <luto@kernel.org> | 2016-09-28 22:34:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-07 16:23:40 +0300 |
| commit | 6c0db7437f4d0a0ce9dcbecb811275d034b11b96 (patch) | |
| tree | 8d2b1f0aa0ae2fa726a7e38dd0c4f6d01a2a1f0a /drivers/gpu/drm | |
| parent | 7677956e4094595732df548681ea9c4d66821bdb (diff) | |
| download | linux-6c0db7437f4d0a0ce9dcbecb811275d034b11b96.tar.xz | |
x86/init: Fix cr4_init_shadow() on CR4-less machines
commit e1bfc11c5a6f40222a698a818dc269113245820e upstream.
cr4_init_shadow() will panic on 486-like machines without CR4. Fix
it using __read_cr4_safe().
Reported-by: david@saggiorato.net
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 1e02ce4cccdc ("x86: Store a per-cpu shadow copy of CR4")
Link: http://lkml.kernel.org/r/43a20f81fb504013bf613913dc25574b45336a61.1475091074.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm')
0 files changed, 0 insertions, 0 deletions