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Wei Yang 172ffeb9b9 mm/nobootmem.c: return 0 when start_pfn equals end_pfn 
When start_pfn equals end_pfn, __free_pages_memory() has no effect and
__free_memory_core() will finally return (end_pfn - start_pfn) = 0.

This patch returns 0 directly when start_pfn equals end_pfn.

Link: http://lkml.kernel.org/r/20170502131115.6650-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-06 16:24:31 -07:00
..
kasan
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-05-10 10:30:46 -07:00
backing-dev.c
bdi: Drop 'parent' argument from bdi_register[_va]()
2017-04-20 12:09:55 -06:00
balloon_compaction.c
mm: balloon: use general non-lru movable page feature
2016-07-26 16:19:19 -07:00
bootmem.c
mm/bootmem.c: cosmetic improvement of code readability
2017-02-22 16:41:29 -08:00
cleancache.c
fs: switch ->s_uuid to uuid_t
2017-06-05 16:59:12 +02:00
cma_debug.c
cma: Store a name in the cma structure
2017-04-18 20:41:12 +02:00
cma.c
cma: Introduce cma_for_each_area
2017-04-18 20:41:12 +02:00
cma.h
cma: Store a name in the cma structure
2017-04-18 20:41:12 +02:00
compaction.c
mm, compaction: finish whole pageblock to reduce fragmentation
2017-05-08 17:15:10 -07:00
debug_page_ref.c
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
debug.c
mm, debug: print raw struct page data in __dump_page()
2016-12-12 18:55:08 -08:00
dmapool.c
lib/vsprintf.c: remove %Z support
2017-02-27 18:43:47 -08:00
early_ioremap.c
mm/early_ioremap: use offset_in_page macro
2015-11-05 19:34:48 -08:00
fadvise.c
mm: fadvise: avoid expensive remote LRU cache draining after FADV_DONTNEED
2016-12-20 09:48:46 -08:00
failslab.c
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
filemap.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 13:08:04 -07:00
frame_vector.c
treewide: use kv[mz]alloc* rather than opencoded variants
2017-05-08 17:15:13 -07:00
frontswap.c
mm, frontswap: convert frontswap_enabled to static key
2016-07-26 16:19:19 -07:00
gup.c
Merge branch 'linus' into x86/mm, to pick up fixes
2017-06-22 10:57:28 +02:00
highmem.c
mm/highmem: make nr_free_highpages() handles all highmem zones by itself
2016-05-19 19:12:14 -07:00
huge_memory.c
thp, mm: fix crash due race in MADV_FREE handling
2017-07-06 16:24:29 -07:00
hugetlb_cgroup.c
mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size
2016-05-20 17:58:30 -07:00
hugetlb.c
mm/hugetlb: report -EHWPOISON not -EFAULT when FOLL_HWPOISON is specified
2017-06-02 15:07:38 -07:00
hwpoison-inject.c
mm: hwpoison: call shake_page() unconditionally
2017-05-03 15:52:12 -07:00
init-mm.c
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
2016-11-22 11:49:48 -06:00
internal.h
mm, compaction: finish whole pageblock to reduce fragmentation
2017-05-08 17:15:10 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2017-07-06 08:59:41 -07:00
Kconfig.debug
mm: enable page poisoning early at boot
2017-05-03 15:52:10 -07:00
khugepaged.c
mm, thp: remove cond_resched from __collapse_huge_page_copy
2017-06-23 16:15:55 -07:00
kmemcheck.c
mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU
2017-04-18 11:42:36 -07:00
kmemleak-test.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak.c
mm: fix section name for .data..ro_after_init
2017-03-31 17:13:30 -07:00
ksm.c
ksm: prevent crash after write_protect_page fails
2017-06-02 15:07:37 -07:00
list_lru.c
mm/list_lru.c: avoid error-path NULL pointer deref
2016-10-27 18:43:42 -07:00
maccess.c
x86: remove more uaccess_32.h complexity
2016-05-22 17:21:27 -07:00
madvise.c
mm/madvise: move up the behavior parameter validation
2017-05-03 15:52:11 -07:00
Makefile
percpu: expose statistics about percpu memory via debugfs
2017-06-20 15:31:38 -04:00
memblock.c
mm: consider memblock reservations for deferred memory initialization sizing
2017-06-02 15:07:38 -07:00
memcontrol.c
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
memory_hotplug.c
mm, vmscan: prevent kswapd sleeping prematurely due to mismatched classzone_idx
2017-05-03 15:52:09 -07:00
memory-failure.c
mm/memory-failure.c: use compound_head() flags for huge pages
2017-06-17 06:37:05 +09:00
memory.c
mm: larger stack guard gap, between vmas
2017-06-19 21:50:20 +08:00
mempolicy.c
mm/mempolicy.c: fix error handling in set_mempolicy and mbind.
2017-04-08 10:57:55 -07:00
mempool.c
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
memtest.c
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
migrate.c
mm: make rmap_one boolean function
2017-05-03 15:52:10 -07:00
mincore.c
mm: remove shmem_mapping() shmem_zero_setup() duplicates
2017-02-24 17:46:56 -08:00
mlock.c
mlock: fix mlock count can not decrease in race condition
2017-06-02 15:07:38 -07:00
mm_init.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mmap.c
mm/mmap.c: mark protection_map as __ro_after_init
2017-07-06 16:24:31 -07:00
mmu_context.c
sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>
2017-03-02 08:42:38 +01:00
mmu_notifier.c
mm: Use static initialization for "srcu"
2017-04-18 11:38:22 -07:00
mmzone.c
mm/mmzone.c: swap likely to unlikely as code logic is different for next_zones_zonelist()
2017-02-22 16:41:29 -08:00
mprotect.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
mremap.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
msync.c
mm/msync: use offset_in_page macro
2015-11-05 19:34:48 -08:00
nobootmem.c
mm/nobootmem.c: return 0 when start_pfn equals end_pfn
2017-07-06 16:24:31 -07:00
nommu.c
mm, vmalloc: use __GFP_HIGHMEM implicitly
2017-05-08 17:15:13 -07:00
oom_kill.c
oom: improve oom disable handling
2017-05-03 15:52:10 -07:00
page_alloc.c
mm: consider memblock reservations for deferred memory initialization sizing
2017-06-02 15:07:38 -07:00
page_counter.c
mm: page_counter: let page_counter_try_charge() return bool
2015-11-05 19:34:48 -08:00
page_ext.c
mm: enable page poisoning early at boot
2017-05-03 15:52:10 -07:00
page_idle.c
mm: make rmap_one boolean function
2017-05-03 15:52:10 -07:00
page_io.c
block: switch bios to blk_status_t
2017-06-09 09:27:32 -06:00
page_isolation.c
mm, page_alloc: count movable pages when stealing from pageblock
2017-05-08 17:15:10 -07:00
page_owner.c
mm/page_owner: don't define fields on struct page_ext by hard-coding
2016-10-07 18:46:27 -07:00
page_poison.c
mm: enable page poisoning early at boot
2017-05-03 15:52:10 -07:00
page_vma_mapped.c
mm: fix page_vma_mapped_walk() for ksm pages
2017-04-08 00:47:48 -07:00
page-writeback.c
Add GETFSMAP support; some performance improvements for very large
2017-05-08 11:30:05 -07:00
pagewalk.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
percpu-internal.h
percpu: fix early calls for spinlock in pcpu_stats
2017-06-21 13:53:52 -04:00
percpu-km.c
percpu: fix static checker warnings in pcpu_destroy_chunk
2017-06-29 11:23:38 -04:00
percpu-stats.c
percpu: expose statistics about percpu memory via debugfs
2017-06-20 15:31:38 -04:00
percpu-vm.c
percpu: fix static checker warnings in pcpu_destroy_chunk
2017-06-29 11:23:38 -04:00
percpu.c
percpu: resolve err may not be initialized in pcpu_alloc
2017-06-21 12:00:45 -04:00
pgtable-generic.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
process_vm_access.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>
2017-03-02 08:42:28 +01:00
quicklist.c
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
readahead.c
mm: don't cap request size based on read-ahead setting
2016-12-12 18:55:08 -08:00
rmap.c
mm, x86/mm: Make the batched unmap TLB flush API more generic
2017-05-24 10:18:27 +02:00
rodata_test.c
mm: remove rodata_test_data export, add pr_fmt
2017-05-03 15:52:09 -07:00
shmem.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 13:08:04 -07:00
slab_common.c
mm: allow slab_nomerge to be set at build time
2017-07-06 16:24:31 -07:00
slab.c
mm/slab.c: replace open-coded round-up code with ALIGN
2017-07-06 16:24:30 -07:00
slab.h
mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU
2017-04-18 11:42:36 -07:00
slob.c
mm: Rename SLAB_DESTROY_BY_RCU to SLAB_TYPESAFE_BY_RCU
2017-04-18 11:42:36 -07:00
slub.c
mm/slub.c: wrap kmem_cache->cpu_partial in config CONFIG_SLUB_CPU_PARTIAL
2017-07-06 16:24:30 -07:00
sparse-vmemmap.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
sparse.c
mm, sparsemem: break out of loops early
2017-07-06 16:24:31 -07:00
swap_cgroup.c
swap: cond_resched in swap_cgroup_prepare()
2017-06-17 06:37:05 +09:00
swap_slots.c
mm, swap: use kvzalloc to allocate some swap data structures
2017-05-08 17:15:13 -07:00
swap_state.c
mm, swap: use kvzalloc to allocate some swap data structures
2017-05-08 17:15:13 -07:00
swap.c
mm: move MADV_FREE pages into LRU_INACTIVE_FILE list
2017-05-03 15:52:08 -07:00
swapfile.c
mm, swap: use kvzalloc to allocate some swap data structures
2017-05-08 17:15:13 -07:00
truncate.c
mm: fix data corruption due to stale mmap reads
2017-05-12 15:57:15 -07:00
usercopy.c
mm/usercopy: Drop extra is_vmalloc_or_module() check
2017-04-05 12:30:18 -07:00
userfaultfd.c
mm: convert generic code to 5-level paging
2017-03-09 11:48:47 -08:00
util.c
mm: clarify why we want kmalloc before falling backto vmallock
2017-06-02 15:07:37 -07:00
vmacache.c
sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>
2017-03-02 08:42:38 +01:00
vmalloc.c
mm/vmalloc.c: huge-vmap: fail gracefully on unexpected huge vmap mappings
2017-06-23 16:15:55 -07:00
vmpressure.c
mm: correct the comment when reclaimed pages exceed the scanned pages
2017-06-17 06:37:05 +09:00
vmscan.c
mm/vmscan.c: fix unsequenced modification and access warning
2017-07-06 16:24:31 -07:00
vmstat.c
mm, vmstat: Remove spurious WARN() during zoneinfo print
2017-05-12 15:57:15 -07:00
workingset.c
mm: memcontrol: use node page state naming scheme for memcg
2017-05-03 15:52:11 -07:00
z3fold.c
z3fold: fix page locking in z3fold_alloc()
2017-04-13 18:24:20 -07:00
zbud.c
mm/zbud.c: use list_last_entry() instead of list_tail_entry()
2016-01-15 11:40:52 -08:00
zpool.c
mm: zsmalloc: constify struct zs_pool name
2015-11-06 17:50:42 -08:00
zsmalloc.c
zsmalloc: expand class bit
2017-04-13 18:24:21 -07:00
zswap.c
zswap: don't param_set_charp while holding spinlock
2017-02-27 18:43:45 -08:00