From: Sebastian Andrzej Siewior Date: Fri, 4 May 2018 14:24:45 +0000 (+0200) Subject: ide: don't disable interrupts during kmap_atomic() X-Git-Tag: for-linus-20180616~24^2~1 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=ce1e518190ea;p=linux-block.git 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 Acked-by: David S. Miller Signed-off-by: David S. Miller --- 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; } }