diff mbox series

[047/178] mm: move page_mapping_file to pagemap.h

Message ID 20210430055535.NuG7Hiuq_%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/178] arch/ia64/kernel/head.S: remove duplicate include | expand

Commit Message

Andrew Morton April 30, 2021, 5:55 a.m. UTC
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: 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>
---

 arch/arm/mm/copypage-v4mc.c   |    1 +
 arch/arm/mm/copypage-v6.c     |    1 +
 arch/arm/mm/copypage-xscale.c |    1 +
 arch/csky/abiv1/cacheflush.c  |    1 +
 arch/mips/mm/cache.c          |    1 +
 arch/nios2/mm/cacheflush.c    |    1 +
 arch/sh/mm/cache-sh4.c        |    1 +
 arch/sh/mm/cache-sh7705.c     |    1 +
 arch/sparc/mm/tlb.c           |    1 +
 include/linux/mm.h            |    1 -
 include/linux/pagemap.h       |   10 ++++++++++
 mm/util.c                     |   10 ----------
 12 files changed, 19 insertions(+), 11 deletions(-)
diff mbox series

Patch

--- a/arch/arm/mm/copypage-v4mc.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/arm/mm/copypage-v6.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/arm/mm/copypage-xscale.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/csky/abiv1/cacheflush.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/mips/mm/cache.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/nios2/mm/cacheflush.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/sh/mm/cache-sh4.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/sh/mm/cache-sh7705.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/arch/sparc/mm/tlb.c~mm-move-page_mapping_file-to-pagemaph
+++ a/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>
--- a/include/linux/mm.h~mm-move-page_mapping_file-to-pagemaph
+++ a/include/linux/mm.h
@@ -1629,7 +1629,6 @@  static inline pgoff_t page_index(struct
 
 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
--- a/include/linux/pagemap.h~mm-move-page_mapping_file-to-pagemaph
+++ a/include/linux/pagemap.h
@@ -158,6 +158,16 @@  static inline void filemap_nr_thps_dec(s
 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
  * is returned. Otherwise, _refcount is incremented by 1 and 1 is returned.
--- a/mm/util.c~mm-move-page_mapping_file-to-pagemaph
+++ a/mm/util.c
@@ -711,16 +711,6 @@  struct address_space *page_mapping(struc
 }
 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)
 {