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memblock: split checks whether a region should be skipped to a helper function 

__next_mem_range() and __next_mem_range_rev() duplicate the code that
checks whether a region should be skipped because of node or flags
incompatibility.

Split this code into a helper function.

Link: http://lkml.kernel.org/r/1549455025-17706-3-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2019-03-11 23:30:50 -07:00 committed by Linus Torvalds
parent fe145124db
commit c9a688a3e9
1 changed files with 25 additions and 28 deletions
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53
mm/memblock.c
View File

@ -965,6 +965,29 @@ void __init_memblock __next_reserved_mem_region(u64 *idx,
*idx = ULLONG_MAX;
}
static bool should_skip_region(struct memblock_region *m, int nid, int flags)
{
int m_nid = memblock_get_region_node(m);
/* only memory regions are associated with nodes, check it */
if (nid != NUMA_NO_NODE && nid != m_nid)
return true;
/* skip hotpluggable memory regions if needed */
if (movable_node_is_enabled() && memblock_is_hotpluggable(m))
return true;
/* if we want mirror memory skip non-mirror memory regions */
if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m))
return true;
/* skip nomap memory unless we were asked for it explicitly */
if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m))
return true;
return false;
}
/**
* __next__mem_range - next function for for_each_free_mem_range() etc.
* @idx: pointer to u64 loop variable
@ -1012,20 +1035,7 @@ void __init_memblock __next_mem_range(u64 *idx, int nid,
phys_addr_t m_end = m->base + m->size;
int m_nid = memblock_get_region_node(m);
/* only memory regions are associated with nodes, check it */
if (nid != NUMA_NO_NODE && nid != m_nid)
continue;
/* skip hotpluggable memory regions if needed */
if (movable_node_is_enabled() && memblock_is_hotpluggable(m))
continue;
/* if we want mirror memory skip non-mirror memory regions */
if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m))
continue;
/* skip nomap memory unless we were asked for it explicitly */
if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m))
if (should_skip_region(m, nid, flags))
continue;
if (!type_b) {
@ -1129,20 +1139,7 @@ void __init_memblock __next_mem_range_rev(u64 *idx, int nid,
phys_addr_t m_end = m->base + m->size;
int m_nid = memblock_get_region_node(m);
/* only memory regions are associated with nodes, check it */
if (nid != NUMA_NO_NODE && nid != m_nid)
continue;
/* skip hotpluggable memory regions if needed */
if (movable_node_is_enabled() && memblock_is_hotpluggable(m))
continue;
/* if we want mirror memory skip non-mirror memory regions */
if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m))
continue;
/* skip nomap memory unless we were asked for it explicitly */
if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m))
if (should_skip_region(m, nid, flags))
continue;
if (!type_b) {