lkml.org 
[lkml]   [2013]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] staging: zcache: fix ppc64 and other arches where PAGE_SIZE!=4K
Date
Replace raw constant 12 with PAGE_SHIFT to fix non-x86 arches and
provoke build failure if PAGE_SHIFT is too big

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
---
drivers/staging/zcache/zbud.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/zcache/zbud.c b/drivers/staging/zcache/zbud.c
index a7c4361..6835fab 100644
--- a/drivers/staging/zcache/zbud.c
+++ b/drivers/staging/zcache/zbud.c
@@ -103,8 +103,8 @@ struct zbudpage {
struct {
unsigned long space_for_flags;
struct {
- unsigned zbud0_size:12;
- unsigned zbud1_size:12;
+ unsigned zbud0_size: PAGE_SHIFT;
+ unsigned zbud1_size: PAGE_SHIFT;
unsigned unevictable:2;
};
struct list_head budlist;
@@ -112,6 +112,9 @@ struct zbudpage {
};
};
};
+#if (PAGE_SHIFT * 2) + 2 > BITS_PER_LONG
+#error "zbud won't work for this arch, PAGE_SIZE is too large"
+#endif

struct zbudref {
union {
--
1.7.1


\
 
 \ /
  Last update: 2013-01-23 23:22    [W:0.149 / U:0.220 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site