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Piotr Kwapulinski e37609bb36 mm/mmap.c: optimization of do_mmap_pgoff function 
The simple check for zero length memory mapping may be performed
earlier.  So that in case of zero length memory mapping some unnecessary
code is not executed at all.  It does not make the code less readable
and saves some CPU cycles.

Signed-off-by: Piotr Kwapulinski <kwapulinski.piotr@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-06-24 17:49:45 -07:00
..
kasan
mm/mempool.c: kasan: poison mempool elements
2015-04-15 16:35:20 -07:00
backing-dev.c
block: discard bdi_unregister() in favour of bdi_destroy()
2015-05-28 10:12:42 -06:00
balloon_compaction.c
mm/balloon_compaction: fix deflation when compaction is disabled
2014-10-29 16:33:15 -07:00
bootmem.c
mem-hotplug: reset node managed pages when hot-adding a new pgdat
2014-11-13 16:17:06 -08:00
cleancache.c
cleancache: remove limit on the number of cleancache enabled filesystems
2015-04-14 16:49:03 -07:00
cma_debug.c
mm/cma_debug.c: remove blank lines before DEFINE_SIMPLE_ATTRIBUTE()
2015-04-15 16:35:20 -07:00
cma.c
mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute
2015-06-24 17:49:44 -07:00
cma.h
mm: cma: allocation trigger
2015-04-14 16:49:00 -07:00
compaction.c
mm/compaction.c: fix "suitable_migration_target() unused" warning
2015-04-15 16:35:20 -07:00
debug-pagealloc.c
mm/debug-pagealloc: make debug-pagealloc boottime configurable
2014-12-13 12:42:48 -08:00
debug.c
mm: account pmd page tables to the process
2015-02-11 17:06:04 -08:00
dmapool.c
mm/dmapool.c: fixed a brace coding style issue
2014-10-09 22:26:00 -04:00
early_ioremap.c
mm: create generic early_ioremap() support
2014-04-07 16:36:15 -07:00
fadvise.c
vfs: remove get_xip_mem
2015-02-16 17:56:03 -08:00
failslab.c
…
filemap.c
mm: do not ignore mapping_gfp_mask in page cache allocation paths
2015-06-24 17:49:44 -07:00
frontswap.c
frontswap: allow multiple backends
2015-06-24 17:49:45 -07:00
gup.c
mm: use READ_ONCE() for non-scalar types
2015-04-15 16:35:18 -07:00
highmem.c
mm/highmem: make kmap cache coloring aware
2014-08-06 18:01:22 -07:00
huge_memory.c
mm: clarify that the function operates on hugepage pte
2015-06-24 17:49:44 -07:00
hugetlb_cgroup.c
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
hugetlb.c
mm/hugetlb: handle races in alloc_huge_page and hugetlb_reserve_pages
2015-06-24 17:49:44 -07:00
hwpoison-inject.c
mm/memory-failure: introduce get_hwpoison_page() for consistent refcount handling
2015-06-24 17:49:42 -07:00
init-mm.c
…
internal.h
mm: remove rest of ACCESS_ONCE() usages
2015-04-15 16:35:18 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
tracing: add trace event for memory-failure
2015-06-24 17:49:43 -07:00
Kconfig.debug
mm/debug_pagealloc: remove obsolete Kconfig options
2015-01-08 15:10:52 -08:00
kmemcheck.c
mm/slab_common: move kmem_cache definition to internal header
2014-10-09 22:25:50 -04:00
kmemleak-test.c
mm/kmemleak-test.c: use pr_fmt for logging
2014-06-06 16:08:18 -07:00
kmemleak.c
mm: kmemleak: optimise kmemleak_lock acquiring during kmemleak_scan
2015-06-24 17:49:45 -07:00
ksm.c
mm: remove rest of ACCESS_ONCE() usages
2015-04-15 16:35:18 -07:00
list_lru.c
memcg: reparent list_lrus and free kmemcg_id on css offline
2015-02-12 18:54:10 -08:00
maccess.c
…
madvise.c
vfs: remove get_xip_mem
2015-02-16 17:56:03 -08:00
Makefile
mm: move memtest under mm
2015-04-14 16:49:06 -07:00
memblock.c
mm/memblock: allocate boot time data structures from mirrored memory
2015-06-24 17:49:45 -07:00
memcontrol.c
memcg: convert mem_cgroup->under_oom from atomic_t to int
2015-06-24 17:49:45 -07:00
memory_hotplug.c
mm/memory_hotplug.c: set zone->wait_table to null after freeing it
2015-06-10 16:43:43 -07:00
memory-failure.c
tracing: add trace event for memory-failure
2015-06-24 17:49:43 -07:00
memory.c
mm, memcg: Try charging a page before setting page up to date
2015-06-24 17:49:43 -07:00
mempolicy.c
mm, numa: really disable NUMA balancing by default on single node machines
2015-05-14 17:55:51 -07:00
mempool.c
mm/mempool.c: kasan: poison mempool elements
2015-04-15 16:35:20 -07:00
memtest.c
mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute
2015-06-24 17:49:44 -07:00
migrate.c
mm: clarify that the function operates on hugepage pte
2015-06-24 17:49:44 -07:00
mincore.c
mincore: apply page table walker on do_mincore()
2015-02-11 17:06:06 -08:00
mlock.c
mm: move mm_populate()-related code to mm/gup.c
2015-04-14 16:49:00 -07:00
mm_init.c
mm/mm_init.c: mark mminit_loglevel __meminitdata
2015-02-12 18:54:11 -08:00
mmap.c
mm/mmap.c: optimization of do_mmap_pgoff function
2015-06-24 17:49:45 -07:00
mmu_context.c
sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm
2014-02-21 08:50:17 +01:00
mmu_notifier.c
mmu_notifier: add the callback for mmu_notifier_invalidate_range()
2014-11-13 13:46:09 +11:00
mmzone.c
mm: microoptimize zonelist operations
2015-02-11 17:06:02 -08:00
mprotect.c
mm: fix mprotect() behaviour on VM_LOCKED VMAs
2015-06-24 17:49:41 -07:00
mremap.c
mm: new arch_remap() hook
2015-06-24 17:49:41 -07:00
msync.c
mm: remove rest usage of VM_NONLINEAR and pte_file()
2015-02-10 14:30:31 -08:00
nobootmem.c
mm/memblock: allocate boot time data structures from mirrored memory
2015-06-24 17:49:45 -07:00
nommu.c
mm: nommu: refactor debug and warning prints
2015-06-24 17:49:44 -07:00
oom_kill.c
mm/oom_kill.c: print points as unsigned int
2015-06-24 17:49:44 -07:00
page_alloc.c
mm: page_alloc: inline should_alloc_retry()
2015-06-24 17:49:43 -07:00
page_counter.c
mm: page_counter: pull "-1" handling out of page_counter_memparse()
2015-02-11 17:06:02 -08:00
page_ext.c
mm/page_owner: keep track of page owners
2014-12-13 12:42:48 -08:00
page_io.c
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
page_isolation.c
CMA: page_isolation: check buddy before accessing it
2015-05-14 17:55:51 -07:00
page_owner.c
mm/page_owner.c: remove unnecessary stack_trace field
2015-02-11 17:06:07 -08:00
page-writeback.c
writeback: use |1 instead of +1 to protect against div by zero
2015-04-23 10:36:33 -06:00
pagewalk.c
mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers
2015-03-25 16:20:30 -07:00
percpu-km.c
percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated
2014-09-02 14:46:05 -04:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
percpu: Fix trivial typos in comments
2015-03-24 13:41:54 -04:00
pgtable-generic.c
mm: clarify that the function operates on hugepage pte
2015-06-24 17:49:44 -07:00
process_vm_access.c
process_vm_access: switch to {compat_,}import_iovec()
2015-04-11 22:27:12 -04:00
quicklist.c
…
readahead.c
fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info
2015-01-20 14:03:04 -07:00
rmap.c
mm: clarify that the function operates on hugepage pte
2015-06-24 17:49:44 -07:00
shmem.c
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-06-22 12:51:21 -07:00
slab_common.c
slab: correct size_index table before replacing the bootstrap kmem_cache_node
2015-06-24 17:49:41 -07:00
slab.c
slab: correct size_index table before replacing the bootstrap kmem_cache_node
2015-06-24 17:49:41 -07:00
slab.h
slab: correct size_index table before replacing the bootstrap kmem_cache_node
2015-06-24 17:49:41 -07:00
slob.c
slob: make slob_alloc_node() static and remove EXPORT_SYMBOL()
2015-04-14 16:48:59 -07:00
slub.c
slab: correct size_index table before replacing the bootstrap kmem_cache_node
2015-06-24 17:49:41 -07:00
sparse-vmemmap.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
sparse.c
mm: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:35:54 -07:00
swap_cgroup.c
mm: page_cgroup: rename file to mm/swap_cgroup.c
2014-12-10 17:41:09 -08:00
swap_state.c
mm: remove rest of ACCESS_ONCE() usages
2015-04-15 16:35:18 -07:00
swap.c
mm: drop bogus VM_BUG_ON_PAGE assert in put_page() codepath
2015-06-24 17:49:42 -07:00
swapfile.c
mm: remove rest of ACCESS_ONCE() usages
2015-04-15 16:35:18 -07:00
truncate.c
mm: rename deactivate_page to deactivate_file_page
2015-04-15 16:35:17 -07:00
util.c
mm: uninline and cleanup page-mapping related helpers
2015-04-15 16:35:19 -07:00
vmacache.c
mm,vmacache: count number of system-wide flushes
2014-12-13 12:42:48 -08:00
vmalloc.c
mm/vmalloc: get rid of dirty bitmap inside vmap_block structure
2015-04-15 16:35:18 -07:00
vmpressure.c
mm/vmpressure.c: fix race in vmpressure_work_fn()
2014-12-02 17:32:07 -08:00
vmscan.c
mm: rename RECLAIM_SWAP to RECLAIM_UNMAP
2015-06-24 17:49:42 -07:00
vmstat.c
vmstat: Reduce time interval to stat update on idle cpu
2015-02-11 17:06:07 -08:00
workingset.c
list_lru: add helpers to isolate items
2015-02-12 18:54:10 -08:00
zbud.c
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
zpool.c
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00
zsmalloc.c
zsmalloc: fix a null pointer dereference in destroy_handle_cache()
2015-06-10 16:43:43 -07:00
zswap.c
mm/zpool: add name argument to create zpool
2015-02-12 18:54:12 -08:00