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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-03-16 22:50:07 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-06-28 22:32:56 +0200 |
| commit | df65c1bcd9b7b639177a5a15da1b8dc3bee4f5fa (patch) | |
| tree | cf57264f1343300b390569054fa8e6bb068babd7 /arch/x86/pci | |
| parent | PCI: Provide Kconfig option for lockless config space accessors (diff) | |
| download | linux-df65c1bcd9b7b639177a5a15da1b8dc3bee4f5fa.tar.xz linux-df65c1bcd9b7b639177a5a15da1b8dc3bee4f5fa.zip | |
x86/PCI: Select CONFIG_PCI_LOCKLESS_CONFIG
All x86 PCI configuration space accessors have either their own
serialization or can operate completely lockless (ECAM).
Disable the global lock in the generic PCI configuration space accessors.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <helgaas@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: linux-pci@vger.kernel.org
Link: http://lkml.kernel.org/r/20170316215057.295079391@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/common.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 190e718694b1..cfd1a89fd04e 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -75,8 +75,8 @@ struct pci_ops pci_root_ops = { }; /* - * This interrupt-safe spinlock protects all accesses to PCI - * configuration space. + * This interrupt-safe spinlock protects all accesses to PCI configuration + * space, except for the mmconfig (ECAM) based operations. */ DEFINE_RAW_SPINLOCK(pci_config_lock); |