Commit 47722e3f authored by Adrian Hunter's avatar Adrian Hunter Committed by Ulf Hansson
Browse files

mmc: sdhci: Replace kmap_atomic() with kmap_local_page() 



kmap_local_page() is equivalent to kmap_atomic() except that it does not
disable page faults or preemption. Where possible kmap_local_page() is
preferred to kmap_atomic() - refer kernel highmem documentation.

In this case, there is no need to disable page faults or preemption, so
replace kmap_atomic() with kmap_local_page(), and, correspondingly,
kunmap_atomic() with kunmap_local().

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-4-adrian.hunter@intel.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e467c154

drivers/mmc/host/sdhci.c

+2 −2
Original line number Diff line number Diff line
@@ -698,12 +698,12 @@ static int sdhci_pre_dma_transfer(struct sdhci_host *host, 


static char *sdhci_kmap_atomic(struct scatterlist *sg)

{

	return kmap_atomic(sg_page(sg)) + sg->offset;

	return kmap_local_page(sg_page(sg)) + sg->offset;

}



static void sdhci_kunmap_atomic(void *buffer)

{

	kunmap_atomic(buffer);

	kunmap_local(buffer);

}



void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,