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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-03-30 20:09:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-31 09:31:11 +0200 |
| commit | a3675b32aac81c2c4733568844f8276527a37423 (patch) | |
| tree | 508526b94cb09ef9a9bd79ed527cc9aac14cc166 /arch/x86/include/asm/ptrace.h | |
| parent | x86/asm/entry/64: Move retint_kernel code block closer to its user (diff) | |
| download | linux-a3675b32aac81c2c4733568844f8276527a37423.tar.xz linux-a3675b32aac81c2c4733568844f8276527a37423.zip | |
x86/asm/entry/64: Do not GET_THREAD_INFO() too early
At exit_intr, we GET_THREAD_INFO(%rcx) and then jump to
retint_kernel if saved CS was from kernel. But the code at
retint_kernel doesn't need %rcx.
Move GET_THREAD_INFO(%rcx) down, after CS check and branch.
While at it, remove "has a correct top of stack" comment.
After recent changes which eliminated FIXUP_TOP_OF_STACK,
we always have a correct pt_regs layout.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1427738975-7391-5-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/ptrace.h')
0 files changed, 0 insertions, 0 deletions