x86/paravirt: add spin_lock_flags lock op

Browse source

It is useful for a pv_lock_ops backend to know whether interrupts are
enabled or not in the context a spin_lock is being called.  This
allows it to enable interrupts while spinning, which could be
particularly helpful when spinning becomes blocking.

The default implementation just calls the normal spin_lock op,
ignoring the flags.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Jeremy Fitzhardinge 2008-08-19 13:19:36 -07:00 • committed by Ingo Molnar

parent 6e833587e1

commit 63d3a75d6f

3 changed files with 20 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

arch/x86/kernel/paravirt-spinlocks.c

View file

7

include/asm-x86/paravirt.h

View file

9

include/asm-x86/spinlock.h

View file