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authorKonstantin Khlebnikov <khlebnikov@openvz.org>2012-03-21 16:33:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-21 17:54:57 -0700
commitce1744f4ed20ca873360e54502f8a71564ef7cc6 (patch)
treeec26dbc6a5417c75a8fa65ab093374d3e0045032
parent092b50bacd1cdbffef2643b7a46f2a215407919c (diff)
downloadvexpress-lsk-ce1744f4ed20ca873360e54502f8a71564ef7cc6.tar.gz
mm: replace PAGE_MIGRATION with IS_ENABLED(CONFIG_MIGRATION)
Since commit 2a11c8ea20bf ("kconfig: Introduce IS_ENABLED(), IS_BUILTIN() and IS_MODULE()") there is a generic grep-friendly method for checking config options in C expressions. Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/migrate.h2
-rw-r--r--mm/mprotect.c2
-rw-r--r--mm/rmap.c7
3 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 05ed2828a55..855c337b20c 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -8,7 +8,6 @@
typedef struct page *new_page_t(struct page *, unsigned long private, int **);
#ifdef CONFIG_MIGRATION
-#define PAGE_MIGRATION 1
extern void putback_lru_pages(struct list_head *l);
extern int migrate_page(struct address_space *,
@@ -32,7 +31,6 @@ extern void migrate_page_copy(struct page *newpage, struct page *page);
extern int migrate_huge_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page);
#else
-#define PAGE_MIGRATION 0
static inline void putback_lru_pages(struct list_head *l) {}
static inline int migrate_pages(struct list_head *l, new_page_t x,
diff --git a/mm/mprotect.c b/mm/mprotect.c
index f437d054c3b..c621e999cbf 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -60,7 +60,7 @@ static void change_pte_range(struct mm_struct *mm, pmd_t *pmd,
ptent = pte_mkwrite(ptent);
ptep_modify_prot_commit(mm, addr, pte, ptent);
- } else if (PAGE_MIGRATION && !pte_file(oldpte)) {
+ } else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) {
swp_entry_t entry = pte_to_swp_entry(oldpte);
if (is_write_migration_entry(entry)) {
diff --git a/mm/rmap.c b/mm/rmap.c
index c8454e06b6c..78cc46b876e 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1282,7 +1282,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
}
dec_mm_counter(mm, MM_ANONPAGES);
inc_mm_counter(mm, MM_SWAPENTS);
- } else if (PAGE_MIGRATION) {
+ } else if (IS_ENABLED(CONFIG_MIGRATION)) {
/*
* Store the pfn of the page in a special migration
* pte. do_swap_page() will wait until the migration
@@ -1293,7 +1293,8 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
}
set_pte_at(mm, address, pte, swp_entry_to_pte(entry));
BUG_ON(pte_file(*pte));
- } else if (PAGE_MIGRATION && (TTU_ACTION(flags) == TTU_MIGRATION)) {
+ } else if (IS_ENABLED(CONFIG_MIGRATION) &&
+ (TTU_ACTION(flags) == TTU_MIGRATION)) {
/* Establish migration entry for a file page */
swp_entry_t entry;
entry = make_migration_entry(page, pte_write(pteval));
@@ -1499,7 +1500,7 @@ static int try_to_unmap_anon(struct page *page, enum ttu_flags flags)
* locking requirements of exec(), migration skips
* temporary VMAs until after exec() completes.
*/
- if (PAGE_MIGRATION && (flags & TTU_MIGRATION) &&
+ if (IS_ENABLED(CONFIG_MIGRATION) && (flags & TTU_MIGRATION) &&
is_vma_temporary_stack(vma))
continue;