Commit d1f250e2 authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Peter Zijlstra
Browse files

x86: Support HAVE_CONTEXT_TRACKING_OFFSTACK 



A lot of ground work has been performed on x86 entry code. Fragile path
between user_enter() and user_exit() have IRQs disabled. Uses of RCU and
intrumentation in these fragile areas have been explicitly annotated
and protected.

This architecture doesn't need exception_enter()/exception_exit()
anymore and has therefore earned CONFIG_HAVE_CONTEXT_TRACKING_OFFSTACK.

Signed-off-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201117151637.259084-6-frederic@kernel.org
parent 6775de49

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -162,6 +162,7 @@ config X86 
	select HAVE_CMPXCHG_DOUBLE

	select HAVE_CMPXCHG_LOCAL

	select HAVE_CONTEXT_TRACKING		if X86_64

	select HAVE_CONTEXT_TRACKING_OFFSTACK	if HAVE_CONTEXT_TRACKING

	select HAVE_C_RECORDMCOUNT

	select HAVE_DEBUG_KMEMLEAK

	select HAVE_DMA_CONTIGUOUS