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mm/memblock.c: refactor functions to set/clear MEMBLOCK_HOTPLUG 

There is a lot of duplication in the rubric around actually setting or
clearing a mem region flag.  Create a new helper function to do this and
reduce each of memblock_mark_hotplug() and memblock_clear_hotplug() to a
single line.

This will be useful if someone were to add a new mem region flag - which
I hope to be doing some day soon. But it looks like a plausible cleanup
even without that - so I'd like to get it out of the way now.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Philipp Hachtmann <phacht@linux.vnet.ibm.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Emil Medve <Emilian.Medve@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tony Luck 2014-12-12 16:54:59 -08:00 committed by Linus Torvalds
parent 95fc3c5010
commit 4308ce17f6
1 changed files with 20 additions and 23 deletions
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43
mm/memblock.c
View File

@ -715,16 +715,13 @@ int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
}
/**
* memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG.
* @base: the base phys addr of the region
* @size: the size of the region
*
* This function isolates region [@base, @base + @size), and mark it with flag
* MEMBLOCK_HOTPLUG.
* This function isolates region [@base, @base + @size), and sets/clears flag
*
* Return 0 on succees, -errno on failure.
*/
int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
static int __init_memblock memblock_setclr_flag(phys_addr_t base,
phys_addr_t size, int set, int flag)
{
struct memblock_type *type = &memblock.memory;
int i, ret, start_rgn, end_rgn;
@ -734,37 +731,37 @@ int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
return ret;
for (i = start_rgn; i < end_rgn; i++)
memblock_set_region_flags(&type->regions[i], MEMBLOCK_HOTPLUG);
if (set)
memblock_set_region_flags(&type->regions[i], flag);
else
memblock_clear_region_flags(&type->regions[i], flag);
memblock_merge_regions(type);
return 0;
}
/**
* memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG.
* @base: the base phys addr of the region
* @size: the size of the region
*
* Return 0 on succees, -errno on failure.
*/
int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
{
return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG);
}
/**
* memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region.
* @base: the base phys addr of the region
* @size: the size of the region
*
* This function isolates region [@base, @base + @size), and clear flag
* MEMBLOCK_HOTPLUG for the isolated regions.
*
* Return 0 on succees, -errno on failure.
*/
int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
{
struct memblock_type *type = &memblock.memory;
int i, ret, start_rgn, end_rgn;
ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn);
if (ret)
return ret;
for (i = start_rgn; i < end_rgn; i++)
memblock_clear_region_flags(&type->regions[i],
MEMBLOCK_HOTPLUG);
memblock_merge_regions(type);
return 0;
return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG);
}
/**