Messages in this thread Patch in this message | | | Date | Tue, 25 Feb 2020 23:08:02 +0100 | From | Thomas Gleixner <> | Subject | [patch 1/8] x86/entry/64: Trace irqflags unconditionally on when returing to user space |
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User space cannot longer disable interrupts so trace return to user space unconditionally as IRQS_ON.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/entry/entry_64.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -174,7 +174,7 @@ SYM_INNER_LABEL(entry_SYSCALL_64_after_h movq %rsp, %rsi call do_syscall_64 /* returns with IRQs disabled */ - TRACE_IRQS_IRETQ /* we're about to change IF */ + TRACE_IRQS_ON /* return enables interrupts */ /* * Try to use SYSRET instead of IRET if we're returning to @@ -619,7 +619,7 @@ SYM_CODE_START_LOCAL(common_interrupt) .Lretint_user: mov %rsp,%rdi call prepare_exit_to_usermode - TRACE_IRQS_IRETQ + TRACE_IRQS_ON SYM_INNER_LABEL(swapgs_restore_regs_and_return_to_usermode, SYM_L_GLOBAL) #ifdef CONFIG_DEBUG_ENTRY
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