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staging: zcache: fix ppc64 and other arches where PAGE_SIZE!=4K 

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Magenheimer 2013-01-23 13:46:30 -08:00 committed by Greg Kroah-Hartman
parent c4048c641a
commit e49ee36d24
1 changed files with 5 additions and 2 deletions
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7
drivers/staging/zcache/zbud.c
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@ -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 {