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authorGrygorii Strashko <grygorii.strashko@ti.com>2014-01-21 15:50:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-21 16:19:46 -0800
commitb115423357e0cda6d8f45d0c81df537d7b004020 (patch)
treef3acecb4396cd1967ae57d71269a84862d9a10ad /mm/memblock.c
parent87029ee9390b2297dae699d5fb135b77992116e5 (diff)
downloadop-kernel-dev-b115423357e0cda6d8f45d0c81df537d7b004020.zip
op-kernel-dev-b115423357e0cda6d8f45d0c81df537d7b004020.tar.gz
mm/memblock: switch to use NUMA_NO_NODE instead of MAX_NUMNODES
It's recommended to use NUMA_NO_NODE everywhere to select "process any node" behavior or to indicate that "no node id specified". Hence, update __next_free_mem_range*() API's to accept both NUMA_NO_NODE and MAX_NUMNODES, but emit warning once on MAX_NUMNODES, and correct corresponding API's documentation to describe new behavior. Also, update other memblock/nobootmem APIs where MAX_NUMNODES is used dirrectly. The change was suggested by Tejun Heo. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Paul Walmsley <paul@pwsan.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Russell King <linux@arm.linux.org.uk> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index a95d6dc..03f1dc7 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -94,7 +94,7 @@ static long __init_memblock memblock_overlaps_region(struct memblock_type *type,
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
* @size: size of free area to find
* @align: alignment of free area to find
- * @nid: nid of the free area to find, %MAX_NUMNODES for any node
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* Utility called from memblock_find_in_range_node(), find free area bottom-up.
*
@@ -126,7 +126,7 @@ __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
* @size: size of free area to find
* @align: alignment of free area to find
- * @nid: nid of the free area to find, %MAX_NUMNODES for any node
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* Utility called from memblock_find_in_range_node(), find free area top-down.
*
@@ -161,7 +161,7 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
* @align: alignment of free area to find
* @start: start of candidate range
* @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
- * @nid: nid of the free area to find, %MAX_NUMNODES for any node
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* Find @size free area aligned to @align in the specified range and node.
*
@@ -242,7 +242,7 @@ phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start,
phys_addr_t align)
{
return memblock_find_in_range_node(size, align, start, end,
- MAX_NUMNODES);
+ NUMA_NO_NODE);
}
static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
@@ -754,7 +754,7 @@ int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
/**
* __next_free_mem_range - next function for for_each_free_mem_range()
* @idx: pointer to u64 loop variable
- * @nid: node selector, %MAX_NUMNODES for all nodes
+ * @nid: node selector, %NUMA_NO_NODE for all nodes
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @out_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @out_nid: ptr to int for nid of the range, can be %NULL
@@ -782,6 +782,11 @@ void __init_memblock __next_free_mem_range(u64 *idx, int nid,
struct memblock_type *rsv = &memblock.reserved;
int mi = *idx & 0xffffffff;
int ri = *idx >> 32;
+ bool check_node = (nid != NUMA_NO_NODE) && (nid != MAX_NUMNODES);
+
+ if (nid == MAX_NUMNODES)
+ pr_warn_once("%s: Usage of MAX_NUMNODES is depricated. Use NUMA_NO_NODE instead\n",
+ __func__);
for ( ; mi < mem->cnt; mi++) {
struct memblock_region *m = &mem->regions[mi];
@@ -789,7 +794,7 @@ void __init_memblock __next_free_mem_range(u64 *idx, int nid,
phys_addr_t m_end = m->base + m->size;
/* only memory regions are associated with nodes, check it */
- if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
+ if (check_node && nid != memblock_get_region_node(m))
continue;
/* scan areas before each reservation for intersection */
@@ -830,7 +835,7 @@ void __init_memblock __next_free_mem_range(u64 *idx, int nid,
/**
* __next_free_mem_range_rev - next function for for_each_free_mem_range_reverse()
* @idx: pointer to u64 loop variable
- * @nid: nid: node selector, %MAX_NUMNODES for all nodes
+ * @nid: nid: node selector, %NUMA_NO_NODE for all nodes
* @out_start: ptr to phys_addr_t for start address of the range, can be %NULL
* @out_end: ptr to phys_addr_t for end address of the range, can be %NULL
* @out_nid: ptr to int for nid of the range, can be %NULL
@@ -850,6 +855,11 @@ void __init_memblock __next_free_mem_range_rev(u64 *idx, int nid,
struct memblock_type *rsv = &memblock.reserved;
int mi = *idx & 0xffffffff;
int ri = *idx >> 32;
+ bool check_node = (nid != NUMA_NO_NODE) && (nid != MAX_NUMNODES);
+
+ if (nid == MAX_NUMNODES)
+ pr_warn_once("%s: Usage of MAX_NUMNODES is depricated. Use NUMA_NO_NODE instead\n",
+ __func__);
if (*idx == (u64)ULLONG_MAX) {
mi = mem->cnt - 1;
@@ -862,7 +872,7 @@ void __init_memblock __next_free_mem_range_rev(u64 *idx, int nid,
phys_addr_t m_end = m->base + m->size;
/* only memory regions are associated with nodes, check it */
- if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
+ if (check_node && nid != memblock_get_region_node(m))
continue;
/* skip hotpluggable memory regions if needed */
@@ -989,7 +999,7 @@ phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int n
phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
{
- return memblock_alloc_base_nid(size, align, max_addr, MAX_NUMNODES);
+ return memblock_alloc_base_nid(size, align, max_addr, NUMA_NO_NODE);
}
phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
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