lkml.org 
[lkml]   [2005]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
Subject[PATCH 2/2] sparse provide pfn_to_nid
From
sparsemem: provide pfn_to_nid

Before SPARSEMEM is initialised we cannot provide an efficient
pfn_to_nid() implmentation; before initialisation is complete we use
early_pfn_to_nid() to provide location information. Until recently
there was no non-init user of this functionality. Provide a post
init pfn_to_nid() implementation.

Note that this implmentation assumes that the pfn passed has
been validated with pfn_valid(). The current single user of this
function already has this check.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
---
mmzone.h | 6 +++++-
1 files changed, 5 insertions(+), 1 deletion(-)
diff -upN reference/include/linux/mmzone.h current/include/linux/mmzone.h
--- reference/include/linux/mmzone.h
+++ current/include/linux/mmzone.h
@@ -606,7 +606,11 @@ static inline int pfn_valid(unsigned lon
* this restriction.
*/
#ifdef CONFIG_NUMA
-#define pfn_to_nid early_pfn_to_nid
+#define pfn_to_nid(pfn) \
+({ \
+ unsigned long __pfn_to_nid_pfn = (pfn); \
+ page_to_nid(pfn_to_page(__pfn_to_nid_pfn)); \
+})
#else
#define pfn_to_nid(pfn) (0)
#endif
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-11-22 19:11    [W:0.077 / U:0.772 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site