aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/setjmp.h
diff options
context:
space:
mode:
authorTimur Tabi <timur@freescale.com>2009-05-26 05:21:41 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-06-16 14:15:44 +1000
commit9317726de42a157c377f7fe9110a63260800582f (patch)
tree14641c8adc6a56b289bdef8acc8b2cf18dbf90f7 /arch/powerpc/include/asm/setjmp.h
parent79290e4b692af8a76273bab38e41a3a385dedc7b (diff)
powerpc: Introduce macro spin_event_timeout()
The macro spin_event_timeout() takes a condition and timeout value (in microseconds) as parameters. It spins until either the condition is true or the timeout expires. It returns the result of the condition when the loop was terminated. This primary purpose of this macro is to poll on a hardware register until a status bit changes. The timeout ensures that the loop still terminates if the bit doesn't change as expected. This macro makes it easier for driver developers to perform this kind of operation properly. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-by: Geoff Thorpe <Geoff.Thorpe@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/setjmp.h')
0 files changed, 0 insertions, 0 deletions