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@xxxxxxxxxx>
---
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
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