AcoSail/kernel_optimize_test
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ide: don't disable interrupts during kmap_atomic()

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ide_pio_bytes() disables interrupts around kmap_atomic(). This is a
leftover from the old kmap_atomic() implementation which relied on fixed
mapping slots, so the caller had to make sure that the same slot could not
be reused from an interrupting context.

kmap_atomic() was changed to dynamic slots long ago and commit 1ec9c5ddc1
("include/linux/highmem.h: remove the second argument of k[un]map_atomic()")
removed the slot assignements, but the callers were not checked for now
redundant interrupt disabling.

Remove the conditional interrupt disable.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sebastian Andrzej Siewior 2018-05-04 16:24:45 +02:00 committed by David S. Miller
parent 56f0ddadce
commit ce1e518190
1 changed files with 0 additions and 8 deletions
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8
drivers/ide/ide-taskfile.c
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@ -237,7 +237,6 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
while (len) {
unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
int page_is_high;
page = sg_page(cursg);
offset = cursg->offset + cmd->cursg_ofs;
@ -248,10 +247,6 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
page_is_high = PageHighMem(page);
if (page_is_high)
local_irq_save(flags);
buf = kmap_atomic(page) + offset;
cmd->nleft -= nr_bytes;
@ -270,9 +265,6 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
kunmap_atomic(buf);
if (page_is_high)
local_irq_restore(flags);
len -= nr_bytes;
}
}