diff options
Diffstat (limited to 'include/linux/mm_types.h')
-rw-r--r-- | include/linux/mm_types.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 5b42f1b..3cc3062 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -151,12 +151,11 @@ struct page { #endif } /* - * If another subsystem starts using the double word pairing for atomic - * operations on struct page then it must change the #if to ensure - * proper alignment of the page struct. + * The struct page can be forced to be double word aligned so that atomic ops + * on double words work. The SLUB allocator can make use of such a feature. */ -#if defined(CONFIG_SLUB) && defined(CONFIG_CMPXCHG_LOCAL) - __attribute__((__aligned__(2*sizeof(unsigned long)))) +#ifdef CONFIG_HAVE_ALIGNED_STRUCT_PAGE + __aligned(2 * sizeof(unsigned long)) #endif ; |