After introducing mem sub section concept, pfn_present() loses its literal
meaning, and will not be necessary a truth on partial populated mem section.
Since all of the callers use it to judge an absent section, it is better to
rename pfn_present() as pfn_in_present_section().
Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Leonardo Bras <leonardo@xxxxxxxxxxxxx>
Cc: Nathan Fontenot <nfont@xxxxxxxxxxxxxxxxxx>
Cc: Nathan Lynch <nathanl@xxxxxxxxxxxxx>
To: linux-mm@xxxxxxxxx
---
v1 -> v2: adopt David's suggestion, rename it as pfn_in_present_section()
arch/powerpc/platforms/pseries/hotplug-memory.c | 2 +-
drivers/base/node.c | 2 +-
include/linux/mmzone.h | 4 ++--
mm/page_ext.c | 2 +-
mm/shuffle.c | 2 +-
5 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index a4d40a3..f3ed1ba 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -360,7 +360,7 @@ static bool lmb_is_removable(struct drmem_lmb *lmb)
for (i = 0; i < scns_per_block; i++) {
pfn = PFN_DOWN(phys_addr);
- if (!pfn_present(pfn)) {
+ if (!pfn_in_present_section(pfn)) {
phys_addr += MIN_MEMORY_BLOCK_SIZE;
continue;
}
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 98a31ba..10d7e81 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -772,7 +772,7 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk,
* memory block could have several absent sections from start.
* skip pfn range from absent section
*/
- if (!pfn_present(pfn)) {
+ if (!pfn_in_present_section(pfn)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
PAGES_PER_SECTION) - 1;
continue;
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 462f687..f6ceebdb 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1372,7 +1372,7 @@ static inline int pfn_valid(unsigned long pfn)
}
#endif
-static inline int pfn_present(unsigned long pfn)
+static inline int pfn_in_present_section(unsigned long pfn)
{
if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
return 0;
@@ -1409,7 +1409,7 @@ void sparse_init(void);
#else
#define sparse_init() do {} while (0)
#define sparse_index_init(_sec, _nid) do {} while (0)
-#define pfn_present pfn_valid
+#define pfn_in_present_section pfn_valid
#define subsection_map_init(_pfn, _nr_pages) do {} while (0)
#endif /* CONFIG_SPARSEMEM */
diff --git a/mm/page_ext.c b/mm/page_ext.c
index 4ade843..08ded03 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -304,7 +304,7 @@ static int __meminit online_page_ext(unsigned long start_pfn,
}
for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) {
- if (!pfn_present(pfn))
+ if (!pfn_in_present_section(pfn))
continue;
fail = init_section_page_ext(pfn, nid);
}
diff --git a/mm/shuffle.c b/mm/shuffle.c
index b3fe97f..c716059 100644
--- a/mm/shuffle.c
+++ b/mm/shuffle.c
@@ -72,7 +72,7 @@ static struct page * __meminit shuffle_valid_page(unsigned long pfn, int order)
return NULL;
/* ...is the pfn in a present section or a hole? */
- if (!pfn_present(pfn))
+ if (!pfn_in_present_section(pfn))
return NULL;
/* ...is the page free and currently on a free_area list? */
--
2.7.5
