tree 6effad1ab6271129fc607b98273086409876563a
parent 48c08d3f8ff94fa118187e4d8d4a5707bb85e59d
author Nick Piggin <nickpiggin@yahoo.com.au> 1119736643 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1119741883 -0700

[PATCH] sched: cleanup context switch locking

Instead of requiring architecture code to interact with the scheduler's
locking implementation, provide a couple of defines that can be used by the
architecture to request runqueue unlocked context switches, and ask for
interrupts to be enabled over the context switch.

Also replaces the "switch_lock" used by these architectures with an oncpu
flag (note, not a potentially slow bitflag).  This eliminates one bus
locked memory operation when context switching, and simplifies the
task_running function.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>