Thread (2 messages) 2 messages, 2 authors, 2013-06-03

[PATCH RFC V9 2/19] x86/ticketlock: Don't inline _spin_unlock when using paravirt spinlocks

STALE4833d

From: Raghavendra K T <hidden>
Date: 2013-06-01 19:18:05
Also in: kvm, lkml, xen-devel
Subsystem: the rest, x86 architecture (32-bit and 64-bit) · Maintainers: Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen

Revision v9 of 6 in this series.

Revisions (6)
  1. v8 [diff vs current]
  2. v9 current
  3. v10 [diff vs current]
  4. v11 [diff vs current]
  5. v12 [diff vs current]
  6. v13 [diff vs current]
x86/ticketlock: Don't inline _spin_unlock when using paravirt spinlocks

From: Raghavendra K T <redacted>

The code size expands somewhat, and its better to just call
a function rather than inline it.

Thanks Jeremy for original version of ARCH_NOINLINE_SPIN_UNLOCK config patch,
which is simplified.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Raghavendra K T <redacted>
---
 arch/x86/Kconfig |    1 +
 1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 685692c..80fcc4b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -621,6 +621,7 @@ config PARAVIRT_DEBUG
 config PARAVIRT_SPINLOCKS
 	bool "Paravirtualization layer for spinlocks"
 	depends on PARAVIRT && SMP
+	select UNINLINE_SPIN_UNLOCK
 	---help---
 	  Paravirtualized spinlocks allow a pvops backend to replace the
 	  spinlock implementation with something virtualization-friendly
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