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drivers: base: refactor add_memory_section() to add_memory_block()

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Right now memory_dev_init() maintains the memory block pointer
between iterations of add_memory_section().  This is nasty.

This patch refactors add_memory_section() to become add_memory_block().
The refactoring pulls the section scanning out of memory_dev_init()
and simplifies the signature.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Seth Jennings 2013-08-20 12:13:03 -05:00 committed by Greg Kroah-Hartman
parent 37171e3cb7
commit cb5e39b803
1 changed files with 21 additions and 27 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

46
drivers/base/memory.c
View file

@ -602,32 +602,31 @@ static int init_memory_block(struct memory_block **memory,
return ret;
}
static int add_memory_section(struct mem_section *section,
struct memory_block **mem_p)
static int add_memory_block(int base_section_nr)
{
struct memory_block *mem = NULL;
int scn_nr = __section_nr(section);
int ret = 0;
struct memory_block *mem;
int i, ret, section_count = 0, section_nr;
if (mem_p && *mem_p) {
if (scn_nr >= (*mem_p)->start_section_nr &&
scn_nr <= (*mem_p)->end_section_nr) {
mem = *mem_p;
}
}
if (mem)
mem->section_count++;
else {
ret = init_memory_block(&mem, section, MEM_ONLINE);
/* store memory_block pointer for next loop */
if (!ret && mem_p)
*mem_p = mem;
for (i = base_section_nr;
(i < base_section_nr + sections_per_block) && i < NR_MEM_SECTIONS;
i++) {
if (!present_section_nr(i))
continue;
if (section_count == 0)
section_nr = i;
section_count++;
}
if (section_count == 0)
return 0;
ret = init_memory_block(&mem, __nr_to_section(section_nr), MEM_ONLINE);
if (ret)
return ret;
mem->section_count = section_count;
return 0;
}
/*
* need an interface for the VM to add new memory regions,
* but without onlining it.
@ -733,7 +732,6 @@ int __init memory_dev_init(void)
int ret;
int err;
unsigned long block_sz;
struct memory_block *mem = NULL;
ret = subsys_system_register(&memory_subsys, memory_root_attr_groups);
if (ret)
@ -747,12 +745,8 @@ int __init memory_dev_init(void)
* during boot and have been initialized
*/
mutex_lock(&mem_sysfs_mutex);
for (i = 0; i < NR_MEM_SECTIONS; i++) {
if (!present_section_nr(i))
continue;
/* don't need to reuse memory_block if only one per block */
err = add_memory_section(__nr_to_section(i),
(sections_per_block == 1) ? NULL : &mem);
for (i = 0; i < NR_MEM_SECTIONS; i += sections_per_block) {
err = add_memory_block(i);
if (!ret)
ret = err;
}