From a907905219dc83f501274d5d8c6d2aa2161ff8c3 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 23 Jun 2009 04:12:24 -0700 Subject: IDE: Save a call to PageHighMem() PageHighMem() isn't cheap so avoid calling it twice on the same page. Signed-off-by: Jean Delvare Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: David S. Miller --- drivers/ide/ide-taskfile.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/ide') diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index 75b85a8cd2d4..90e5c0deb0e0 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -236,6 +236,7 @@ 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; if (nr_bytes > PAGE_SIZE) nr_bytes = PAGE_SIZE; @@ -247,7 +248,8 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, page = nth_page(page, (offset >> PAGE_SHIFT)); offset %= PAGE_SIZE; - if (PageHighMem(page)) + page_is_high = PageHighMem(page); + if (page_is_high) local_irq_save(flags); buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; @@ -268,7 +270,7 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd, kunmap_atomic(buf, KM_BIO_SRC_IRQ); - if (PageHighMem(page)) + if (page_is_high) local_irq_restore(flags); len -= nr_bytes; -- cgit v1.2.3