This allows gcc to fold duplicate calls into a single call. Since the current users do actually call it multiple times with the same arguments, this is an obvious win. --- drivers/gpu/drm/radeon/r600_blit.c | 2 +- drivers/gpu/drm/radeon/r600_blit_shaders.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600_blit.c b/drivers/gpu/drm/radeon/r600_blit.c index 54980d8..b4304288 100644 --- a/drivers/gpu/drm/radeon/r600_blit.c +++ b/drivers/gpu/drm/radeon/r600_blit.c @@ -499,7 +499,7 @@ set_default_state(drm_radeon_private_t *dev_priv) * as the fractional bits will not fit in a float. (It would be better to * round towards even as the fpu does, but that is slower.) */ -uint32_t int2float(uint32_t x) +__pure uint32_t int2float(uint32_t x) { uint32_t msb, exponent, fraction;
diff --git a/drivers/gpu/drm/radeon/r600_blit_shaders.h b/drivers/gpu/drm/radeon/r600_blit_shaders.h index e17c2cb..2f3ce7a 100644 --- a/drivers/gpu/drm/radeon/r600_blit_shaders.h +++ b/drivers/gpu/drm/radeon/r600_blit_shaders.h @@ -35,5 +35,5 @@ extern const u32 r6xx_default_state[]; extern const u32 r6xx_ps_size, r6xx_vs_size; extern const u32 r6xx_default_size, r7xx_default_size;
-uint32_t int2float(uint32_t x); +__pure uint32_t int2float(uint32_t x); #endif