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...cts 64-bit builds or not, didn't care to look at the assembly or check the standard. drivers/gpu/drm/nouveau/nouveau_abi16.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c index b701117..66abf4d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_abi16.c +++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c @@ -139,7 +139,7 @@ nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16, /* destroy channel object, all children will be killed too */ if (chan->chan) { - abi16->handles &= ~(1 <&l...

The ffsll function is a lot slower than the __ffs64 built-in which compiles to a single instruction on 64-bit. It's also nice to avoid custom versions of standard functions. Note that __ffs == ffs - 1. Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> --- I wrote a user-space program to test these out and make sure that the functions behaved as expected. The logic in abi16 had to be