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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-01-06 14:59:00 +0100
committerAndrew Morton <akpm@linux-foundation.org>2023-01-18 17:12:57 -0800
commit61d3d5108eb621d2a097c41f6cc83bf63b1b6c03 (patch)
tree192725cf98474914ab2e36d5169a7b8fe1f44cbd
parent02d65d6fb1aae151570c8bfd1bd77a8153d2e607 (diff)
mm: remove PageMovable export
The only in-kernel users that need PageMovable() to be exported are z3fold and zsmalloc and they are only using it for dubious debugging functionality. So remove those usages and the export so that no driver code accidentally thinks that they are allowed to use this symbol. Link: https://lkml.kernel.org/r/20230106135900.3763622-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-rw-r--r--mm/compaction.c1
-rw-r--r--mm/z3fold.c2
-rw-r--r--mm/zsmalloc.c3
3 files changed, 0 insertions, 6 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index ca1603524bbe..62a61de44658 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -122,7 +122,6 @@ bool PageMovable(struct page *page)
return false;
}
-EXPORT_SYMBOL(PageMovable);
void __SetPageMovable(struct page *page, const struct movable_operations *mops)
{
diff --git a/mm/z3fold.c b/mm/z3fold.c
index a4de0c317ac7..0cef845d397b 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1450,7 +1450,6 @@ static bool z3fold_page_isolate(struct page *page, isolate_mode_t mode)
struct z3fold_header *zhdr;
struct z3fold_pool *pool;
- VM_BUG_ON_PAGE(!PageMovable(page), page);
VM_BUG_ON_PAGE(PageIsolated(page), page);
if (test_bit(PAGE_HEADLESS, &page->private))
@@ -1490,7 +1489,6 @@ static int z3fold_page_migrate(struct page *newpage, struct page *page,
struct z3fold_header *zhdr, *new_zhdr;
struct z3fold_pool *pool;
- VM_BUG_ON_PAGE(!PageMovable(page), page);
VM_BUG_ON_PAGE(!PageIsolated(page), page);
VM_BUG_ON_PAGE(!test_bit(PAGE_CLAIMED, &page->private), page);
VM_BUG_ON_PAGE(!PageLocked(newpage), newpage);
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 9445bee6b014..6aafacd664fc 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1973,7 +1973,6 @@ static bool zs_page_isolate(struct page *page, isolate_mode_t mode)
* Page is locked so zspage couldn't be destroyed. For detail, look at
* lock_zspage in free_zspage.
*/
- VM_BUG_ON_PAGE(!PageMovable(page), page);
VM_BUG_ON_PAGE(PageIsolated(page), page);
zspage = get_zspage(page);
@@ -2005,7 +2004,6 @@ static int zs_page_migrate(struct page *newpage, struct page *page,
if (mode == MIGRATE_SYNC_NO_COPY)
return -EINVAL;
- VM_BUG_ON_PAGE(!PageMovable(page), page);
VM_BUG_ON_PAGE(!PageIsolated(page), page);
/* The page is locked, so this pointer must remain valid */
@@ -2070,7 +2068,6 @@ static void zs_page_putback(struct page *page)
{
struct zspage *zspage;
- VM_BUG_ON_PAGE(!PageMovable(page), page);
VM_BUG_ON_PAGE(!PageIsolated(page), page);
zspage = get_zspage(page);