mm: move page_mapping_file to pagemap.h

page_mapping_file() is only used by some architectures, and then it
is usually only used in one place.  Make it a static inline function
so other architectures don't have to carry this dead code.

Link: https://lkml.kernel.org/r/20210317123011.350118-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index 44f7292ec27be736934825a8462a93f0d607b6d1..f1da3b439b968a1ba483ab08b5ee70b23eb3c610 100644 (file)
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>

diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index 6a769a6c314ef3c5c2d31c9ab7441e43a4d5808f..d8a115de5507aec5afeacf07ab39cd667c42fe08 100644 (file)
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -8,6 +8,7 @@
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/shmparam.h>
 #include <asm/tlbflush.h>

diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c
index eb5d338657d10e382de27dbe5521cdb5039eb507..bcb485620a05f0b8107c357a5b7abeed50854db4 100644 (file)
--- a/arch/arm/mm/copypage-xscale.c
+++ b/arch/arm/mm/copypage-xscale.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>

diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c
index 9f1fe80cc8473663b8a5556ab82b3cda592d91a8..07ff17ea33deee283acce917eefefad689f9a0a4 100644 (file)
--- a/arch/csky/abiv1/cacheflush.c
+++ b/arch/csky/abiv1/cacheflush.c
@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/syscalls.h>
 #include <linux/spinlock.h>
 #include <asm/page.h>

diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 7719d632df8dfa62af229eb80d2d5ae76ba32a51..a7bf0c80371cd02063add7e8300738649a9ee28c 100644 (file)
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -15,6 +15,7 @@
 #include <linux/syscalls.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/cacheflush.h>
 #include <asm/processor.h>

diff --git a/arch/nios2/mm/cacheflush.c b/arch/nios2/mm/cacheflush.c
index 65de1bd6a7604aef65ab38034a77f6ffb9cfa472..6aa9257c3ede429ae19455f174fb20ae3cfa8d31 100644 (file)
--- a/arch/nios2/mm/cacheflush.c
+++ b/arch/nios2/mm/cacheflush.c
@@ -11,6 +11,7 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 
 #include <asm/cacheflush.h>
 #include <asm/cpuinfo.h>

diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index ddfa9685f1ef740fba09fc3597eb962adaabaa4f..72c2e1b46c0838bf7b9cb8888396f62ee1c28c44 100644 (file)
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -16,6 +16,7 @@
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 #include <asm/mmu_context.h>
 #include <asm/cache_insns.h>
 #include <asm/cacheflush.h>

diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 4c67b3d887750c0ee854175a5d6aad192bb5f46a..9b63a53a5e46fe9a5730a727f75a772b161d0094 100644 (file)
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -13,6 +13,7 @@
 #include <linux/mman.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/threads.h>
 #include <asm/addrspace.h>
 #include <asm/page.h>

diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
index 20ee14739333225f38a5588282514d45baa1c751..9a725547578e87a3c89f5cff592376dd1f2f5c76 100644 (file)
--- a/arch/sparc/mm/tlb.c
+++ b/arch/sparc/mm/tlb.c
@@ -9,6 +9,7 @@
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/preempt.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 21115933b9b8e45bcd7d7b7282e55d238f8e7fae..2e5c207e702cb468f3ad32ca53aae9811d4c04c1 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1629,7 +1629,6 @@ static inline pgoff_t page_index(struct page *page)
 
 bool page_mapped(struct page *page);
 struct address_space *page_mapping(struct page *page);
-struct address_space *page_mapping_file(struct page *page);
 
 /*
  * Return true only if the page has been allocated with

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 4686f9ab0636e5be7902ff787883848d49a2df81..469fa7ffcf9634c9c6030cd73bf4ac32d5618e53 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -157,6 +157,16 @@ static inline void filemap_nr_thps_dec(struct address_space *mapping)
 
 void release_pages(struct page **pages, int nr);
 
+/*
+ * For file cache pages, return the address_space, otherwise return NULL
+ */
+static inline struct address_space *page_mapping_file(struct page *page)
+{
+       if (unlikely(PageSwapCache(page)))
+               return NULL;
+       return page_mapping(page);
+}
+
 /*
  * speculatively take a reference to a page.
  * If the page is free (_refcount == 0), then _refcount is untouched, and 0

diff --git a/mm/util.c b/mm/util.c
index c37e24d5fa43e2c527f2ef62a409be5f2e1b97b5..083c5c417cfc79938eac2d6204b96bcb1b5b28c1 100644 (file)
--- a/mm/util.c
+++ b/mm/util.c
@@ -711,16 +711,6 @@ struct address_space *page_mapping(struct page *page)
 }
 EXPORT_SYMBOL(page_mapping);
 
-/*
- * For file cache pages, return the address_space, otherwise return NULL
- */
-struct address_space *page_mapping_file(struct page *page)
-{
-       if (unlikely(PageSwapCache(page)))
-               return NULL;
-       return page_mapping(page);
-}
-
 /* Slow path of page_mapcount() for compound pages */
 int __page_mapcount(struct page *page)
 {