From: William Lee Irwin III <wli@holomorphy.com>
To: axboe@suse.de
Cc: linux-kernel@vger.kernel.org
Subject: blkdev.h paddr overflows
Date: Sat, 4 Jan 2003 03:42:39 -0800 [thread overview]
Message-ID: <20030104114239.GD10697@holomorphy.com> (raw)
This patch, originally from Zwane Mwaikambo for my current page
clustering tree, corrects overflows with pfn's shifted to paddrs.
The portion of the fix casting the pfn's to dma_addr_t, included
here, is applicable to mainline.
Please apply,
Bill
===== include/linux/blkdev.h 1.94 vs edited =====
--- 1.94/include/linux/blkdev.h Tue Nov 19 17:13:41 2002
+++ edited/include/linux/blkdev.h Mon Dec 30 11:09:01 2002
@@ -287,8 +287,8 @@
* BLK_BOUNCE_ANY : don't bounce anything
* BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary
*/
-#define BLK_BOUNCE_HIGH (blk_max_low_pfn << PAGE_SHIFT)
-#define BLK_BOUNCE_ANY (blk_max_pfn << PAGE_SHIFT)
+#define BLK_BOUNCE_HIGH ((dma_addr_t)blk_max_low_pfn << PAGE_SHIFT)
+#define BLK_BOUNCE_ANY ((dma_addr_t)blk_max_pfn << PAGE_SHIFT)
#define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD)
extern int init_emergency_isa_pool(void);
reply other threads:[~2003-01-04 11:34 UTC|newest]
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