x86/traps: Make interrupt enable/disable symmetric in C code

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Traps enable interrupts conditionally but rely on the ASM return code to
disable them again. That results in redundant interrupt disable and trace
calls.

Make the trap handlers disable interrupts before returning to avoid that,
which allows simplification of the ASM entry code in follow up changes.

Originally-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505134903.622702796@linutronix.de

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This commit is contained in:

Thomas Gleixner 2019-10-23 14:27:10 +02:00

parent c9317202af

commit ca4c6a9858

2 changed files with 32 additions and 11 deletions

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28

arch/x86/kernel/traps.c

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15

arch/x86/mm/fault.c

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