From: Anton Blanchard <anton@samba.org>
To: torvalds@transmeta.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] Use page_to_pfn in BIO code
Date: Tue, 4 Jun 2002 19:47:42 +1000 [thread overview]
Message-ID: <20020604094741.GA17665@krispykreme> (raw)
Hi,
While porting the DISCONTIGMEM code to ppc64 (in order to do NUMA memory
allocation) I noticed the bio code uses page_to_phys. We should instead
be using the recently introduced page_to_pfn code.
This now limits the direct usage of mem_map (at least on ppc64) to
two spots - page_to_pfn/pfn_to_page which makes DISCONTIGMEM support
quite trivial.
Anton
diff -urN linux-2.5_ppc64/include/linux/bio.h linux-2.5_work/include/linux/bio.h
--- linux-2.5_ppc64/include/linux/bio.h Wed May 8 10:31:25 2002
+++ linux-2.5_work/include/linux/bio.h Tue Jun 4 16:20:41 2002
@@ -128,8 +130,8 @@
/*
* will die
*/
-#define bio_to_phys(bio) (page_to_phys(bio_page((bio))) + (unsigned long) bio_offset((bio)))
-#define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset)
+#define bio_to_phys(bio) ((page_to_pfn(bio_page((bio))) << PAGE_SHIFT) + (unsigned long) bio_offset((bio)))
+#define bvec_to_phys(bv) ((page_to_pfn((bv)->bv_page) << PAGE_SHIFT) + (unsigned long) (bv)->bv_offset)
/*
* queues that have highmem support enabled may still need to revert to
reply other threads:[~2002-06-04 9:49 UTC|newest]
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