kmap() has been deprecated in favor of the kmap_local_page() due to high cost, restricted mapping space, the overhead of a global lock for synchronization, and making the process sleep in the absence of free slots. kmap_local_page() is faster than kmap() and offers thread-local and CPU-local mappings, take pagefaults in a local kmap region and preserves preemption by saving the mappings of outgoing tasks and restoring those of the incoming one during a context switch. The mapping is kept thread local in the function “i915_vma_coredump_create” in i915_gpu_error.c Therefore, replace kmap() with kmap_local_page(). Suggested-by: Ira Weiny <ira.weiny@xxxxxxxxx> Signed-off-by: Sumitra Sharma <sumitraartsy@xxxxxxxxx> --- Changes in v2: - Replace kmap() with kmap_local_page(). - Change commit subject and message. drivers/gpu/drm/i915/i915_gpu_error.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index f020c0086fbc..bc41500eedf5 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1164,9 +1164,9 @@ i915_vma_coredump_create(const struct intel_gt *gt, drm_clflush_pages(&page, 1); - s = kmap(page); + s = kmap_local_page(page); ret = compress_page(compress, s, dst, false); - kunmap(page); + kunmap_local(s); drm_clflush_pages(&page, 1); -- 2.25.1
