diff options
Diffstat (limited to 'include/linux/page-flags.h')
| -rw-r--r-- | include/linux/page-flags.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 6d53675c2b54..d1fe1a761047 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -228,9 +228,9 @@ PAGEFLAG(OwnerPriv1, owner_priv_1) TESTCLEARFLAG(OwnerPriv1, owner_priv_1) TESTPAGEFLAG(Writeback, writeback) TESTSCFLAG(Writeback, writeback) PAGEFLAG(MappedToDisk, mappedtodisk) -/* PG_readahead is only used for file reads; PG_reclaim is only for writes */ +/* PG_readahead is only used for reads; PG_reclaim is only for writes */ PAGEFLAG(Reclaim, reclaim) TESTCLEARFLAG(Reclaim, reclaim) -PAGEFLAG(Readahead, reclaim) /* Reminder to do async read-ahead */ +PAGEFLAG(Readahead, reclaim) TESTCLEARFLAG(Readahead, reclaim) #ifdef CONFIG_HIGHMEM /* @@ -329,7 +329,9 @@ static inline void set_page_writeback(struct page *page) * System with lots of page flags available. This allows separate * flags for PageHead() and PageTail() checks of compound pages so that bit * tests can be used in performance sensitive paths. PageCompound is - * generally not used in hot code paths. + * generally not used in hot code paths except arch/powerpc/mm/init_64.c + * and arch/powerpc/kvm/book3s_64_vio_hv.c which use it to detect huge pages + * and avoid handling those in real mode. */ __PAGEFLAG(Head, head) CLEARPAGEFLAG(Head, head) __PAGEFLAG(Tail, tail) @@ -410,7 +412,7 @@ static inline void ClearPageCompound(struct page *page) */ static inline int PageTransHuge(struct page *page) { - VM_BUG_ON(PageTail(page)); + VM_BUG_ON_PAGE(PageTail(page), page); return PageHead(page); } @@ -458,25 +460,25 @@ static inline int PageTransTail(struct page *page) */ static inline int PageSlabPfmemalloc(struct page *page) { - VM_BUG_ON(!PageSlab(page)); + VM_BUG_ON_PAGE(!PageSlab(page), page); return PageActive(page); } static inline void SetPageSlabPfmemalloc(struct page *page) { - VM_BUG_ON(!PageSlab(page)); + VM_BUG_ON_PAGE(!PageSlab(page), page); SetPageActive(page); } static inline void __ClearPageSlabPfmemalloc(struct page *page) { - VM_BUG_ON(!PageSlab(page)); + VM_BUG_ON_PAGE(!PageSlab(page), page); __ClearPageActive(page); } static inline void ClearPageSlabPfmemalloc(struct page *page) { - VM_BUG_ON(!PageSlab(page)); + VM_BUG_ON_PAGE(!PageSlab(page), page); ClearPageActive(page); } |