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authorJiang Liu <liuj97@gmail.com>2013-07-04 02:03:41 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 03:07:35 +0400
commit7ee3d4e8cd560500192d80ca84d7f15d6dee0807 (patch)
tree8c58a121edb9c528fb6497e04774dca8d121aa4f /include
parenta214a8c68bcdef2fb0803425f7fe36fe41030d3f (diff)
downloadlinux-7ee3d4e8cd560500192d80ca84d7f15d6dee0807.tar.xz
mm: introduce helper function mem_init_print_info() to simplify mem_init()
Introduce helper function mem_init_print_info() to simplify mem_init() across different architectures, which also unifies the format and information printed. Function mem_init_print_info() calculates memory statistics information without walking each page, so it should be a little faster on some architectures. Also introduce another helper get_num_physpages() to kill the global variable num_physpages. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Michel Lespinasse <walken@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4310f80ce956..09c235301dbb 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1323,6 +1323,7 @@ extern void free_highmem_page(struct page *page);
#endif
extern void adjust_managed_page_count(struct page *page, long count);
+extern void mem_init_print_info(const char *str);
/* Free the reserved page into the buddy system, so it gets managed. */
static inline void __free_reserved_page(struct page *page)
@@ -1358,6 +1359,17 @@ static inline unsigned long free_initmem_default(int poison)
poison, "unused kernel");
}
+static inline unsigned long get_num_physpages(void)
+{
+ int nid;
+ unsigned long phys_pages = 0;
+
+ for_each_online_node(nid)
+ phys_pages += node_present_pages(nid);
+
+ return phys_pages;
+}
+
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
/*
* With CONFIG_HAVE_MEMBLOCK_NODE_MAP set, an architecture may initialise its