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ide: use PageHighMem() instead of ifdefs in ide_pio_bytes()

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Use PageHighMem() instead of ifdefs in ide_pio_bytes()
(=> local IRQs won't be disabled when not necessary).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-03-31 20:14:59 +02:00
parent 7a00798b1a
commit f2bc316736
1 changed files with 6 additions and 8 deletions
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14
drivers/ide/ide-taskfile.c
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@ -195,9 +195,7 @@ static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
struct scatterlist *sg = hwif->sg_table;
struct scatterlist *cursg = cmd->cursg;
struct page *page;
#ifdef CONFIG_HIGHMEM
unsigned long flags;
#endif
unsigned int offset;
u8 *buf;
@ -218,9 +216,9 @@ static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;
#ifdef CONFIG_HIGHMEM
local_irq_save(flags);
#endif
if (PageHighMem(page))
local_irq_save(flags);
buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
cmd->nleft -= nr_bytes;
@ -238,9 +236,9 @@ static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
kunmap_atomic(buf, KM_BIO_SRC_IRQ);
#ifdef CONFIG_HIGHMEM
local_irq_restore(flags);
#endif
if (PageHighMem(page))
local_irq_restore(flags);
len -= nr_bytes;
}