[PATCH] drm/amdkfd: simplify svm_range_unmap_from_gpus()

Yury Norov
2026-01-14T16:05:21Z

The function calls bitmap_or() followed by for_each_set_bit().
Switch it to the dedicated for_each_or_bit() and drop the temporary
bitmap.

Signed-off-by: Yury Norov <ynorov@nvidia.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 79ea138897fc..eed76b13d191 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -1344,7 +1344,6 @@ static int
svm_range_unmap_from_gpus(struct svm_range *prange, unsigned long start,
unsigned long last, uint32_t trigger)
{
- DECLARE_BITMAP(bitmap, MAX_GPU_INSTANCE);
struct kfd_process_device *pdd;
struct dma_fence *fence = NULL;
struct kfd_process *p;
@@ -1362,11 +1361,9 @@ svm_range_unmap_from_gpus(struct svm_range *prange, unsigned long start,
prange->mapped_to_gpu = false;
}

- bitmap_or(bitmap, prange->bitmap_access, prange->bitmap_aip,
- MAX_GPU_INSTANCE);
p = container_of(prange->svms, struct kfd_process, svms);

- for_each_set_bit(gpuidx, bitmap, MAX_GPU_INSTANCE) {
+ for_each_or_bit(gpuidx, prange->bitmap_access, prange->bitmap_aip, MAX_GPU_INSTANCE) {
pr_debug("unmap from gpu idx 0x%x\n", gpuidx);
pdd = kfd_process_device_from_gpuidx(p, gpuidx);
if (!pdd) {
--
2.43.0