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

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>

1 files changed, 6 insertions, 8 deletions

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 8d7e87d04b3b..0e333ecf2ad6 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -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;
         }