Messages in this thread | | | From | Andy Lutomirski <> | Subject | [PATCH v2 0/2] x86/entry: Do context tracking with IRQs off (finally!) | Date | Wed, 9 Mar 2016 13:24:03 -0800 |
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This provides no direct benefit by itself, but it finally lets us apply some of the speedups that Paolo and possible Rik independently wrote: we won't need an irqsave/irqrestore pair in the context tracking code.
It should also let us remove the last callers of exception_enter in x86 kernels, but that removal should probably wait until I carefully re-read the page fault code.
Changes from v1: - Fix a comment - Make the ifdeffery less messy
Andy Lutomirski (2): x86/entry/32: Change INT80 to be an interrupt gate x86/entry: Do enter_from_user_mode with IRQs off
arch/x86/entry/common.c | 48 +++++++++++--------------------------- arch/x86/entry/entry_32.S | 8 +++---- arch/x86/entry/entry_64_compat.S | 2 +- arch/x86/include/asm/thread_info.h | 5 +++- arch/x86/kernel/traps.c | 2 +- 5 files changed, 24 insertions(+), 41 deletions(-)
-- 2.5.0
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