ARM v6 (at least) only allows cmpxchg on 32bit variables which doesn't
always include the bool type.
drivers/built-in.o: In function `vblank_disable_and_save':
imx-ocotp.c:(.text+0xb45e8): undefined reference to `__bad_cmpxchg'
Makefile:986: recipe for target 'vmlinux' failed
Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Reported-by: Leonard Crestez <leonard.crestez@xxxxxxx>
Fixes: 43dc7fe2b211 ("drm: Mark up accesses of vblank->enabled outside of its spinlock")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/drm_irq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index aa23b9833588..dac1b2593cb1 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -338,8 +338,10 @@ static void vblank_disable_and_save(struct drm_device *dev, unsigned int pipe)
* calling the ->disable_vblank() operation in atomic context with the
* hardware potentially runtime suspended.
*/
- if (cmpxchg_relaxed(&vblank->enabled, true, false))
+ if (vblank->enabled) {
__disable_vblank(dev, pipe);
+ vblank->enabled = false;
+ }
/*
* Always update the count and timestamp to maintain the
--
2.11.0
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