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| author | Ingo Molnar <mingo@elte.hu> | 2009-10-06 15:02:30 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-06 15:02:34 +0200 |
| commit | d9b2002c406011164f245de7a81304625989f1c9 (patch) | |
| tree | a2bb74773cd1409acbec5eb2fbba2ae9889d55e8 /arch/x86/kernel/entry_64.S | |
| parent | c3b32fcbc7f4fd9a9b84718b991b175b0fd53f8c (diff) | |
| parent | 906010b2134e14a2e377decbadd357b3d0ab9c6a (diff) | |
| download | linux-d9b2002c406011164f245de7a81304625989f1c9.tar.gz linux-d9b2002c406011164f245de7a81304625989f1c9.tar.bz2 linux-d9b2002c406011164f245de7a81304625989f1c9.zip | |
Merge branch 'perf/urgent' into perf/core
Merge reason: Upcoming patch is dependent on a fix in perf/urgent.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 681c3fda7391..b5c061f8f358 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -536,20 +536,13 @@ sysret_signal: bt $TIF_SYSCALL_AUDIT,%edx jc sysret_audit #endif - /* edx: work flags (arg3) */ - leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1 - xorl %esi,%esi # oldset -> arg2 - SAVE_REST - FIXUP_TOP_OF_STACK %r11 - call do_notify_resume - RESTORE_TOP_OF_STACK %r11 - RESTORE_REST - movl $_TIF_WORK_MASK,%edi - /* Use IRET because user could have changed frame. This - works because ptregscall_common has called FIXUP_TOP_OF_STACK. */ - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF - jmp int_with_check + /* + * We have a signal, or exit tracing or single-step. + * These all wind up with the iret return path anyway, + * so just join that path right now. + */ + FIXUP_TOP_OF_STACK %r11, -ARGOFFSET + jmp int_check_syscall_exit_work badsys: movq $-ENOSYS,RAX-ARGOFFSET(%rsp) @@ -654,6 +647,7 @@ int_careful: int_very_careful: TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) +int_check_syscall_exit_work: SAVE_REST /* Check for syscall exit trace */ testl $_TIF_WORK_SYSCALL_EXIT,%edx |