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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-03 17:27:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-03 17:27:42 -0700 |
| commit | 8c073517a992124e385040c0da0df809abfa8f61 (patch) | |
| tree | b0b3f2c4c6cf96ca358d58d8376d4b5e8e89eba1 /arch/x86/Kconfig | |
| parent | 03ffbcdd7898c0b5299efeb9f18de927487ec1cf (diff) | |
| parent | df65c1bcd9b7b639177a5a15da1b8dc3bee4f5fa (diff) | |
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 PCI updates from Thomas Gleixner:
"This update provides the seperation of x86 PCI accessors from the
global PCI lock in the generic PCI config space accessors.
The reasons for this are:
- x86 has it's own PCI config lock for various reasons, so the
accessors have to lock two locks nested.
- The ECAM (mmconfig) access to the extended configuration space does
not require locking. The existing generic locking causes a massive
lock contention when accessing the extended config space of the
Uncore facility for performance monitoring.
The commit which switched the access to the primary config space over
to ECAM mode has been removed from the branch, so the primary config
space is still accessed with type1 accessors properly serialized by
the x86 internal locking.
Bjorn agreed on merging this through the x86 tree"
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/PCI: Select CONFIG_PCI_LOCKLESS_CONFIG
PCI: Provide Kconfig option for lockless config space accessors
x86/PCI/ce4100: Properly lock accessor functions
x86/PCI: Abort if legacy init fails
x86/PCI: Remove duplicate defines
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7bdb9022c6e7..dfe1a7ffe6d4 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -168,6 +168,7 @@ config X86 select HAVE_UNSTABLE_SCHED_CLOCK select HAVE_USER_RETURN_NOTIFIER select IRQ_FORCED_THREADING + select PCI_LOCKLESS_CONFIG select PERF_EVENTS select RTC_LIB select RTC_MC146818_LIB |