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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 17:52:23 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-08 17:52:23 -0700 |
commit | f6f7a6369203fa3e07efb7f35cfd81efe9f25b07 (patch) | |
tree | 97bec9ddd999040822acf314647eaf4208213589 /mm/early_ioremap.c | |
parent | 839fe9156fbe89c3157aa6146d22090f8cffddd8 (diff) | |
parent | df69f52d990bd85159727bd26e819d3a6e49c666 (diff) | |
download | linux-stable-f6f7a6369203fa3e07efb7f35cfd81efe9f25b07.tar.gz linux-stable-f6f7a6369203fa3e07efb7f35cfd81efe9f25b07.tar.bz2 linux-stable-f6f7a6369203fa3e07efb7f35cfd81efe9f25b07.zip |
Merge branch 'akpm' (patches from Andrew)
Merge second patch-bomb from Andrew Morton:
"Almost all of the rest of MM. There was an unusually large amount of
MM material this time"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (141 commits)
zpool: remove no-op module init/exit
mm: zbud: constify the zbud_ops
mm: zpool: constify the zpool_ops
mm: swap: zswap: maybe_preload & refactoring
zram: unify error reporting
zsmalloc: remove null check from destroy_handle_cache()
zsmalloc: do not take class lock in zs_shrinker_count()
zsmalloc: use class->pages_per_zspage
zsmalloc: consider ZS_ALMOST_FULL as migrate source
zsmalloc: partial page ordering within a fullness_list
zsmalloc: use shrinker to trigger auto-compaction
zsmalloc: account the number of compacted pages
zsmalloc/zram: introduce zs_pool_stats api
zsmalloc: cosmetic compaction code adjustments
zsmalloc: introduce zs_can_compact() function
zsmalloc: always keep per-class stats
zsmalloc: drop unused variable `nr_to_migrate'
mm/memblock.c: fix comment in __next_mem_range()
mm/page_alloc.c: fix type information of memoryless node
memory-hotplug: fix comments in zone_spanned_pages_in_node() and zone_spanned_pages_in_node()
...
Diffstat (limited to 'mm/early_ioremap.c')
-rw-r--r-- | mm/early_ioremap.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c index 0cfadafb3fb0..23f744d77ce0 100644 --- a/mm/early_ioremap.c +++ b/mm/early_ioremap.c @@ -224,6 +224,28 @@ early_memremap_ro(resource_size_t phys_addr, unsigned long size) return (__force void *)__early_ioremap(phys_addr, size, FIXMAP_PAGE_RO); } #endif + +#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) + +void __init copy_from_early_mem(void *dest, phys_addr_t src, unsigned long size) +{ + unsigned long slop, clen; + char *p; + + while (size) { + slop = src & ~PAGE_MASK; + clen = size; + if (clen > MAX_MAP_CHUNK - slop) + clen = MAX_MAP_CHUNK - slop; + p = early_memremap(src & PAGE_MASK, clen + slop); + memcpy(dest, p + slop, clen); + early_memunmap(p, clen + slop); + dest += clen; + src += clen; + size -= clen; + } +} + #else /* CONFIG_MMU */ void __init __iomem * |