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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2018-05-04 16:24:45 +0200
committerDavid S. Miller <davem@davemloft.net>2018-06-05 16:26:47 -0400
commitce1e518190ea71d1ecf1a91a8b0794ba9bd78e89 (patch)
tree829b73812093465b6af318d10e41d86aa328d864
parent56f0ddadcea9dc264f1c8eed6cc984071b141554 (diff)
downloadlinux-ce1e518190ea71d1ecf1a91a8b0794ba9bd78e89.tar.bz2
ide: don't disable interrupts during kmap_atomic()
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 1ec9c5ddc17a ("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>
-rw-r--r--drivers/ide/ide-taskfile.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index c034cd965831..14bdab15a454 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -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;
}
}