Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1281882

[PATCH 1/3] drivers: memory: clean up section counting

Show all headers | View raw

Right now, section_count is calculated in add_memory_block().
However, init_memory_block() increments section_count as well,
which, at first, seems like it would lead to an off-by-one error.
There is no harm done because add_memory_block() immediately overwrites
the mem->section_count, but it is messy.

This commit moves the increment out of the common init_memory_block()
(called by both add_memory_block() and register_new_memory()) and
adds it to register_new_memory().

Signed-off-by: Seth Jennings <sjennings@variantweb.net>
---
 drivers/base/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 2804aed..ca2ce02 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -614,7 +614,6 @@ static int init_memory_block(struct memory_block **memory,
 			base_memory_block_id(scn_nr) * sections_per_block;
 	mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
 	mem->state = state;
-	mem->section_count++;
 	start_pfn = section_nr_to_pfn(mem->start_section_nr);
 	mem->phys_device = arch_get_memory_phys_device(start_pfn);
 
@@ -668,6 +667,7 @@ int register_new_memory(int nid, struct mem_section *section)
 		ret = init_memory_block(&mem, section, MEM_OFFLINE);
 		if (ret)
 			goto out;
+		mem->section_count++;
 	}
 
 	if (mem->section_count == sections_per_block)
-- 
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 1/3] drivers: memory: clean up section counting Seth Jennings <sjennings@variantweb.net> - 2015-12-02 16:10 +0100
  [PATCH 2/3] drivers: memory: rename remove_memory_block() to remove_memory_section() Seth Jennings <sjennings@variantweb.net> - 2015-12-02 16:10 +0100

csiph-web