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authorOscar Salvador <osalvador@suse.de>2018-08-17 15:47:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-17 16:20:30 -0700
commit4e40987f12de2f244d0d2ef64730aca92922c95a (patch)
tree4f4061d4e964df3edbe19d8a6b5a756425409546 /mm/sparse.c
parent29ef680ae7c21110af8e6416d84d8a72fc147b14 (diff)
mm/sparse.c: make sparse_init_one_section void and remove check
sparse_init_one_section() is being called from two sites: sparse_init() and sparse_add_one_section(). The former calls it from a for_each_present_section_nr() loop, and the latter marks the section as present before calling it. This means that when sparse_init_one_section() gets called, we already know that the section is present. So there is no point to double check that in the function. This removes the check and makes the function void. [ross.zwisler@linux.intel.com: fix error path in sparse_add_one_section] Link: http://lkml.kernel.org/r/20180706190658.6873-1-ross.zwisler@linux.intel.com [ross.zwisler@linux.intel.com: simplification suggested by Oscar] Link: http://lkml.kernel.org/r/20180706223358.742-1-ross.zwisler@linux.intel.com Link: http://lkml.kernel.org/r/20180702154325.12196-1-osalvador@techadventures.net Signed-off-by: Oscar Salvador <osalvador@suse.de> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com> Cc: Oscar Salvador <osalvador@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/sparse.c')
-rw-r--r--mm/sparse.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index f13f2723950a..b1b14a9c4041 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -257,19 +257,14 @@ struct page *sparse_decode_mem_map(unsigned long coded_mem_map, unsigned long pn
return ((struct page *)coded_mem_map) + section_nr_to_pfn(pnum);
}
-static int __meminit sparse_init_one_section(struct mem_section *ms,
+static void __meminit sparse_init_one_section(struct mem_section *ms,
unsigned long pnum, struct page *mem_map,
unsigned long *pageblock_bitmap)
{
- if (!present_section(ms))
- return -EINVAL;
-
ms->section_mem_map &= ~SECTION_MAP_MASK;
ms->section_mem_map |= sparse_encode_mem_map(mem_map, pnum) |
SECTION_HAS_MEM_MAP;
ms->pageblock_flags = pageblock_bitmap;
-
- return 1;
}
unsigned long usemap_size(void)
@@ -760,6 +755,7 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat,
ret = sparse_index_init(section_nr, pgdat->node_id);
if (ret < 0 && ret != -EEXIST)
return ret;
+ ret = 0;
memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, altmap);
if (!memmap)
return -ENOMEM;
@@ -786,12 +782,11 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat,
#endif
section_mark_present(ms);
-
- ret = sparse_init_one_section(ms, section_nr, memmap, usemap);
+ sparse_init_one_section(ms, section_nr, memmap, usemap);
out:
pgdat_resize_unlock(pgdat, &flags);
- if (ret <= 0) {
+ if (ret < 0) {
kfree(usemap);
__kfree_section_memmap(memmap, altmap);
}