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mmc: bcm2835: 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/20221005101951.3165-7-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2022-10-05 13:19:43 +03:00 committed by Ulf Hansson
parent e9c9722220
commit 07e23c14e1
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/bcm2835.c
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@ -1070,7 +1070,7 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
host->drain_page += host->drain_offset >> PAGE_SHIFT;
host->drain_offset &= ~PAGE_MASK;
}
page = kmap_atomic(host->drain_page);
page = kmap_local_page(host->drain_page);
buf = page + host->drain_offset;
while (host->drain_words) {
@ -1081,7 +1081,7 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
host->drain_words--;
}
kunmap_atomic(page);
kunmap_local(page);
}
bcm2835_finish_data(host);