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

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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: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-4-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2022-10-05 13:19:40 +03:00 committed by Ulf Hansson
parent e467c154f7
commit 47722e3fd9
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/sdhci.c
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@ -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,