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Commit 47cec443 authored by Mike Rapoport's avatar Mike Rapoport Committed by Jonathan Corbet
Browse files

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: default avatarMike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent e1720fee

include/linux/memblock.h

+12 −5
Original line number Diff line number Diff line
@@ -239,7 +239,6 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, 
/**

 * for_each_resv_unavail_range - iterate through reserved and unavailable memory

 * @i: u64 used as loop variable

 * @flags: pick from blocks based on memory attributes

 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL

 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL

 *
@@ -367,8 +366,10 @@ phys_addr_t memblock_get_current_limit(void); 
 */



/**

 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region

 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region

 * @reg: memblock_region structure

 *

 * Return: the lowest pfn intersecting with the memory region

 */

static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)

{
@@ -376,8 +377,10 @@ static inline unsigned long memblock_region_memory_base_pfn(const struct membloc 
}



/**

 * memblock_region_memory_end_pfn - Return the end_pfn this region

 * memblock_region_memory_end_pfn - get the end pfn of the memory region

 * @reg: memblock_region structure

 *

 * Return: the end_pfn of the reserved region

 */

static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)

{
@@ -385,8 +388,10 @@ static inline unsigned long memblock_region_memory_end_pfn(const struct memblock 
}



/**

 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region

 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region

 * @reg: memblock_region structure

 *

 * Return: the lowest pfn intersecting with the reserved region

 */

static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)

{
@@ -394,8 +399,10 @@ static inline unsigned long memblock_region_reserved_base_pfn(const struct membl 
}



/**

 * memblock_region_reserved_end_pfn - Return the end_pfn this region

 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region

 * @reg: memblock_region structure

 *

 * Return: the end_pfn of the reserved region

 */

static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)

{

mm/memblock.c

+47 −37
Original line number Diff line number Diff line
@@ -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)

{
@@ -322,7 +326,7 @@ void __init memblock_discard(void) 
 * 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,
@@ -501,7 +505,7 @@ static void __init_memblock memblock_insert_region(struct memblock_type *type, 
 * 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,
@@ -619,7 +623,7 @@ int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 
 * 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,
@@ -1121,7 +1130,7 @@ void __init_memblock __next_mem_pfn_range(int *idx, int 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 @@ static void * __init memblock_virt_alloc_internal( 
 * 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(
@@ -1670,7 +1679,7 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 
 *

 * 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)