drm/ttm: fix type mismatch error on sparc64

On sparc64, __fls() returns an "int", but the drm TTM code expected it
to be "unsigned long" as on x86.  As a result, on sparc (and arc, and
m68k) you get build errors because 'min()' checks that the types match.

As suggested by Linus, it can use min_t instead of min to force the type
to be "unsigned int".

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
index cb38b1a17b09852d1a509964b5608eebb47129fc..82cbb29a05aa3904d7adc4d22933db989d05b04d 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -383,7 +383,8 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
        else
                gfp_flags |= GFP_HIGHUSER;
 
-       for (order = min(MAX_ORDER - 1UL, __fls(num_pages)); num_pages;
+       for (order = min_t(unsigned int, MAX_ORDER - 1, __fls(num_pages));
+            num_pages;
             order = min_t(unsigned int, order, __fls(num_pages))) {
                bool apply_caching = false;
                struct ttm_pool_type *pt;