archives/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-03-08 03:24:45 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

dma-buf: heaps: Clear CMA pages with clear_page()

Browse source 
clear_page() translates into memset(*p, 0, PAGE_SIZE) on some
architectures, but on the major architectures it will call
an optimized assembly snippet so use this instead of open
coding a memset().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Nirmoy Das <nirmoyd@nvidia.com>
Reviewed-by: T.J. Mercier <tjmercier@google.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20251130-dma-buf-heap-clear-page-v1-1-a8dcea2a88ee@linaro.org
This commit is contained in:
Linus Walleij 2025-11-30 11:54:48 +01:00 • committed by Linus Walleij
parent 6a0b99e9fb
commit d42d701e13
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/dma-buf/heaps/cma_heap.c
View file

@ -331,7 +331,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap,
while (nr_clear_pages > 0) {
void *vaddr = kmap_local_page(page);
memset(vaddr, 0, PAGE_SIZE);
clear_page(vaddr);
kunmap_local(vaddr);
/*
* Avoid wasting time zeroing memory if the process