diff options
| author | Jan Beulich <[email protected]> | 2015-06-01 13:03:59 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-06-02 10:10:09 +0200 |
| commit | 2f63b9db7260beba3c19d66d6c11b0b78ea84a8c (patch) | |
| tree | c56e0e4d2003abcb0b3d4736e5c14909f6449140 | |
| parent | 2bf557ea3f49576fabe24cd5daf1a34e9ee22c3c (diff) | |
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 <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -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 */ |