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authorMike Rapoport <rppt@linux.vnet.ibm.com>2018-06-30 17:55:02 +0300
committerJonathan Corbet <corbet@lwn.net>2018-08-02 12:17:28 -0600
commit47cec4432ab06c4ba90c241b142a016f878ac6da (patch)
treeb4d308999a2f983e2cddaa23297f27999b1cad39 /mm/memblock.c
parente1720fee27246dfb84f7c433e35367170a2d4436 (diff)
docs/mm: memblock: update kernel-doc comments
* make memblock_discard description kernel-doc compatible * add brief description for memblock_setclr_flag and describe its parameters * fixup return value descriptions Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c84
1 files changed, 47 insertions, 37 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 20f48b49821a..4b9dd76f6ae6 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -92,10 +92,11 @@ bool __init_memblock memblock_overlaps_region(struct memblock_type *type,
return i < type->cnt;
}
-/*
+/**
* __memblock_find_range_bottom_up - find free area utility in bottom-up
* @start: start of candidate range
- * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
+ * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or
+ * %MEMBLOCK_ALLOC_ACCESSIBLE
* @size: size of free area to find
* @align: alignment of free area to find
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
@@ -103,7 +104,7 @@ bool __init_memblock memblock_overlaps_region(struct memblock_type *type,
*
* Utility called from memblock_find_in_range_node(), find free area bottom-up.
*
- * RETURNS:
+ * Return:
* Found address on success, 0 on failure.
*/
static phys_addr_t __init_memblock
@@ -129,7 +130,8 @@ __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
/**
* __memblock_find_range_top_down - find free area utility, in top-down
* @start: start of candidate range
- * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
+ * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or
+ * %MEMBLOCK_ALLOC_ACCESSIBLE
* @size: size of free area to find
* @align: alignment of free area to find
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
@@ -137,7 +139,7 @@ __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end,
*
* Utility called from memblock_find_in_range_node(), find free area top-down.
*
- * RETURNS:
+ * Return:
* Found address on success, 0 on failure.
*/
static phys_addr_t __init_memblock
@@ -169,7 +171,8 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
* @size: size of free area to find
* @align: alignment of free area to find
* @start: start of candidate range
- * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
+ * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or
+ * %MEMBLOCK_ALLOC_ACCESSIBLE
* @nid: nid of the free area to find, %NUMA_NO_NODE for any node
* @flags: pick from blocks based on memory attributes
*
@@ -183,7 +186,7 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
*
* If bottom-up allocation failed, will try to allocate memory top-down.
*
- * RETURNS:
+ * Return:
* Found address on success, 0 on failure.
*/
phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
@@ -238,13 +241,14 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
/**
* memblock_find_in_range - find free area in given range
* @start: start of candidate range
- * @end: end of candidate range, can be %MEMBLOCK_ALLOC_{ANYWHERE|ACCESSIBLE}
+ * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or
+ * %MEMBLOCK_ALLOC_ACCESSIBLE
* @size: size of free area to find
* @align: alignment of free area to find
*
* Find @size free area aligned to @align in the specified range.
*
- * RETURNS:
+ * Return:
* Found address on success, 0 on failure.
*/
phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start,
@@ -288,7 +292,7 @@ static void __init_memblock memblock_remove_region(struct memblock_type *type, u
#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
/**
- * Discard memory and reserved arrays if they were allocated
+ * memblock_discard - discard memory and reserved arrays if they were allocated
*/
void __init memblock_discard(void)
{
@@ -318,11 +322,11 @@ void __init memblock_discard(void)
*
* Double the size of the @type regions array. If memblock is being used to
* allocate memory for a new reserved regions array and there is a previously
- * allocated memory range [@new_area_start,@new_area_start+@new_area_size]
+ * allocated memory range [@new_area_start, @new_area_start + @new_area_size]
* waiting to be reserved, ensure the memory used by the new array does
* not overlap.
*
- * RETURNS:
+ * Return:
* 0 on success, -1 on failure.
*/
static int __init_memblock memblock_double_array(struct memblock_type *type,
@@ -467,7 +471,7 @@ static void __init_memblock memblock_merge_regions(struct memblock_type *type)
* @nid: node id of the new region
* @flags: flags of the new region
*
- * Insert new memblock region [@base,@base+@size) into @type at @idx.
+ * Insert new memblock region [@base, @base + @size) into @type at @idx.
* @type must already have extra room to accommodate the new region.
*/
static void __init_memblock memblock_insert_region(struct memblock_type *type,
@@ -496,12 +500,12 @@ static void __init_memblock memblock_insert_region(struct memblock_type *type,
* @nid: nid of the new region
* @flags: flags of the new region
*
- * Add new memblock region [@base,@base+@size) into @type. The new region
+ * Add new memblock region [@base, @base + @size) into @type. The new region
* is allowed to overlap with existing ones - overlaps don't affect already
* existing regions. @type is guaranteed to be minimal (all neighbouring
* compatible regions are merged) after the addition.
*
- * RETURNS:
+ * Return:
* 0 on success, -errno on failure.
*/
int __init_memblock memblock_add_range(struct memblock_type *type,
@@ -615,11 +619,11 @@ int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
* @end_rgn: out parameter for the end of isolated region
*
* Walk @type and ensure that regions don't cross the boundaries defined by
- * [@base,@base+@size). Crossing regions are split at the boundaries,
+ * [@base, @base + @size). Crossing regions are split at the boundaries,
* which may create at most two more regions. The index of the first
* region inside the range is returned in *@start_rgn and end in *@end_rgn.
*
- * RETURNS:
+ * Return:
* 0 on success, -errno on failure.
*/
static int __init_memblock memblock_isolate_range(struct memblock_type *type,
@@ -730,10 +734,15 @@ int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
}
/**
+ * memblock_setclr_flag - set or clear flag for a memory region
+ * @base: base address of the region
+ * @size: size of the region
+ * @set: set or clear the flag
+ * @flag: the flag to udpate
*
* This function isolates region [@base, @base + @size), and sets/clears flag
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
static int __init_memblock memblock_setclr_flag(phys_addr_t base,
phys_addr_t size, int set, int flag)
@@ -760,7 +769,7 @@ static int __init_memblock memblock_setclr_flag(phys_addr_t base,
* @base: the base phys addr of the region
* @size: the size of the region
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
{
@@ -772,7 +781,7 @@ int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size)
* @base: the base phys addr of the region
* @size: the size of the region
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
{
@@ -784,7 +793,7 @@ int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size)
* @base: the base phys addr of the region
* @size: the size of the region
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
{
@@ -798,7 +807,7 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
* @base: the base phys addr of the region
* @size: the size of the region
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
{
@@ -810,7 +819,7 @@ int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
* @base: the base phys addr of the region
* @size: the size of the region
*
- * Return 0 on success, -errno on failure.
+ * Return: 0 on success, -errno on failure.
*/
int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size)
{
@@ -971,9 +980,6 @@ void __init_memblock __next_mem_range(u64 *idx, int nid,
/**
* __next_mem_range_rev - generic next function for for_each_*_range_rev()
*
- * Finds the next range from type_a which is not marked as unsuitable
- * in type_b.
- *
* @idx: pointer to u64 loop variable
* @nid: node selector, %NUMA_NO_NODE for all nodes
* @flags: pick from blocks based on memory attributes
@@ -983,6 +989,9 @@ void __init_memblock __next_mem_range(u64 *idx, int nid,
* @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
*
+ * Finds the next range from type_a which is not marked as unsuitable
+ * in type_b.
+ *
* Reverse of __next_mem_range().
*/
void __init_memblock __next_mem_range_rev(u64 *idx, int nid,
@@ -1118,10 +1127,10 @@ void __init_memblock __next_mem_pfn_range(int *idx, int nid,
* @type: memblock type to set node ID for
* @nid: node ID to set
*
- * Set the nid of memblock @type regions in [@base,@base+@size) to @nid.
+ * Set the nid of memblock @type regions in [@base, @base + @size) to @nid.
* Regions which cross the area boundaries are split as necessary.
*
- * RETURNS:
+ * Return:
* 0 on success, -errno on failure.
*/
int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
@@ -1245,7 +1254,7 @@ phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, i
* The allocation is performed from memory region limited by
* memblock.current_limit if @max_addr == %BOOTMEM_ALLOC_ACCESSIBLE.
*
- * The memory block is aligned on SMP_CACHE_BYTES if @align == 0.
+ * The memory block is aligned on %SMP_CACHE_BYTES if @align == 0.
*
* The phys address of allocated boot memory block is converted to virtual and
* allocated memory is reset to 0.
@@ -1253,7 +1262,7 @@ phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, i
* In addition, function sets the min_count to 0 using kmemleak_alloc for
* allocated boot memory block, so that it is never reported as leaks.
*
- * RETURNS:
+ * Return:
* Virtual address of allocated memory block on success, NULL on failure.
*/
static void * __init memblock_virt_alloc_internal(
@@ -1338,7 +1347,7 @@ done:
* info), if enabled. Does not zero allocated memory, does not panic if request
* cannot be satisfied.
*
- * RETURNS:
+ * Return:
* Virtual address of allocated memory block on success, NULL on failure.
*/
void * __init memblock_virt_alloc_try_nid_raw(
@@ -1375,7 +1384,7 @@ void * __init memblock_virt_alloc_try_nid_raw(
* Public function, provides additional debug information (including caller
* info), if enabled. This function zeroes the allocated memory.
*
- * RETURNS:
+ * Return:
* Virtual address of allocated memory block on success, NULL on failure.
*/
void * __init memblock_virt_alloc_try_nid_nopanic(
@@ -1411,7 +1420,7 @@ void * __init memblock_virt_alloc_try_nid_nopanic(
* which provides debug information (including caller info), if enabled,
* and panics if the request can not be satisfied.
*
- * RETURNS:
+ * Return:
* Virtual address of allocated memory block on success, NULL on failure.
*/
void * __init memblock_virt_alloc_try_nid(
@@ -1668,9 +1677,9 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
* @base: base of region to check
* @size: size of region to check
*
- * Check if the region [@base, @base+@size) is a subset of a memory block.
+ * Check if the region [@base, @base + @size) is a subset of a memory block.
*
- * RETURNS:
+ * Return:
* 0 if false, non-zero if true
*/
bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
@@ -1689,9 +1698,10 @@ bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t siz
* @base: base of region to check
* @size: size of region to check
*
- * Check if the region [@base, @base+@size) intersects a reserved memory block.
+ * Check if the region [@base, @base + @size) intersects a reserved
+ * memory block.
*
- * RETURNS:
+ * Return:
* True if they intersect, false if not.
*/
bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)