diff options
| author | Jan Beulich <JBeulich@suse.com> | 2015-06-01 14:03:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-02 10:10:09 +0200 |
| commit | 2f63b9db7260beba3c19d66d6c11b0b78ea84a8c (patch) | |
| tree | c56e0e4d2003abcb0b3d4736e5c14909f6449140 /arch/x86 | |
| parent | x86/asm/entry/64: Use negative immediates for stack adjustments (diff) | |
| download | linux-2f63b9db7260beba3c19d66d6c11b0b78ea84a8c.tar.xz linux-2f63b9db7260beba3c19d66d6c11b0b78ea84a8c.zip | |
x86/asm/entry/64: Fold identical code paths
retint_kernel doesn't require %rcx to be pointing to thread info
(anymore?), and the code on the two alternative paths is - not
really surprisingly - identical.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
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: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/556C664F020000780007FB64@mail.emea.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index b84cec50c8cf..4ad79e946f5a 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -615,7 +615,7 @@ ret_from_intr: testb $3, CS(%rsp) jz retint_kernel /* Interrupt came from user space */ - +retint_user: GET_THREAD_INFO(%rcx) /* * %rcx: thread info. Interrupts off. @@ -1194,15 +1194,9 @@ ENTRY(error_exit) RESTORE_EXTRA_REGS DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - GET_THREAD_INFO(%rcx) testl %eax,%eax jnz retint_kernel - LOCKDEP_SYS_EXIT_IRQ - movl TI_flags(%rcx),%edx - movl $_TIF_WORK_MASK,%edi - andl %edi,%edx - jnz retint_careful - jmp retint_swapgs + jmp retint_user END(error_exit) /* Runs on exception stack */ |