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author | Andy Lutomirski <luto@kernel.org> | 2016-03-09 19:00:29 -0800 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-03-10 09:48:13 +0100 |
commit | 8bb5643686d2898bec181c407651cf84e77d413f (patch) | |
tree | fffaba109deef6957634a64d7830c2214b9d652d /kernel/task_work.c | |
parent | 81edd9f69a6fd214fdbe66b43de6aa1610c84c63 (diff) | |
download | linux-8bb5643686d2898bec181c407651cf84e77d413f.tar.gz |
x86/entry/traps: Clear DR6 early in do_debug() and improve the comment
Leaving any bits set in DR6 on return from a debug exception is asking for trouble. Prevent it by writing zero right away and clarify the comment. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: Andy Lutomirski <luto@amacapital.net> 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: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/3857676e1be8fb27db4b89bbb1e2052b7f435ff4.1457578375.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/task_work.c')
0 files changed, 0 insertions, 0 deletions