diff options
| author |   Tejun Heo <tj@kernel.org> | 2011-07-12 11:15:59 +0200 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2011-07-14 11:47:47 -0700 |
| commit | 35fd0808d7d8d001cd72f112e3bca84664b596a3 (patch) | |
| tree | d4e21e003e182bc4824a74fd850ac3869380b53b /include/linux/memblock.h | |
| parent | x86: Use __memblock_alloc_base() in early_reserve_e820() (diff) | |
| download | linux-dev-35fd0808d7d8d001cd72f112e3bca84664b596a3.tar.xz linux-dev-35fd0808d7d8d001cd72f112e3bca84664b596a3.zip | |
memblock: Implement for_each_free_mem_range()
Implement for_each_free_mem_range() which iterates over free memory
areas according to memblock (memory && !reserved). This will be used
to simplify memblock users.
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1310462166-31469-7-git-send-email-tj@kernel.org
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'include/linux/memblock.h')
| -rw-r--r-- | include/linux/memblock.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index c36a55d3c1c2..31def584cceb 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -61,6 +61,26 @@ extern long memblock_remove(phys_addr_t base, phys_addr_t size); extern long memblock_free(phys_addr_t base, phys_addr_t size); extern long memblock_reserve(phys_addr_t base, phys_addr_t size); +extern void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start, + phys_addr_t *out_end, int *out_nid); + +/** + * for_each_free_mem_range - iterate through free memblock areas + * @i: u64 used as loop variable + * @nid: node selector, %MAX_NUMNODES for all nodes + * @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 + * @p_nid: ptr to int for nid of the range, can be %NULL + * + * Walks over free (memory && !reserved) areas of memblock. Available as + * soon as memblock is initialized. + */ +#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ + for (i = 0, \ + __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \ + i != (u64)ULLONG_MAX; \ + __next_free_mem_range(&i, nid, p_start, p_end, p_nid)) + #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP extern int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); |