x86/traps: Mark fixup_bad_iret() noinstr

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This is called from deep entry ASM in a situation where instrumentation
will cause more harm than providing useful information.

Switch from memmove() to memcpy() because memmove() can't be called
from noinstr code. 

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505134903.346741553@linutronix.de

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Thomas Gleixner 2020-03-25 19:53:38 +01:00

parent 1c3e5d3f60

commit d73a332936

1 changed files with 9 additions and 7 deletions

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arch/x86/kernel/traps.c

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