Cesar Eduardo Barros 803d0c8351 sys_swapon: use vzalloc() instead of vmalloc/memset ... This patch series refactors the sys_swapon function. sys_swapon is currently a very large function, with 313 lines (more than 12 25-line screens), which can make it a bit hard to read. This patch series reduces this size by half, by extracting large chunks of related code to new helper functions. One of these chunks of code was nearly identical to the part of sys_swapoff which is used in case of a failure return from try_to_unuse(), so this patch series also makes both share the same code. As a side effect of all this refactoring, the compiled code gets a bit smaller (from v1 of this patch series): text data bss dec hex filename 14012 944 276 15232 3b80 mm/swapfile.o.before 13941 944 276 15161 3b39 mm/swapfile.o.after This patch: Use vzalloc() instead of vmalloc/memset. Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Tested-by: Eric B Munson <emunson@mgebm.net> Acked-by: Eric B Munson <emunson@mgebm.net> Reviewed-by: Pekka Enberg <penberg@kernel.org> Reviewed-by: Jesper Juhl <jj@chaosbits.net> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-03-22 17:44:05 -07:00
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backing-dev.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-10-26 17:58:44 -07:00
bootmem.c	bootmem: Move contig_page_data definition to bootmem.c/nobootmem.c	2011-02-24 14:43:06 +01:00
bounce.c	bounce: call flush_dcache_page() after bounce_copy_vec()	2010-09-09 18:57:25 -07:00
compaction.c	mm: compaction: minimise the time IRQs are disabled while isolating pages for migration	2011-03-22 17:44:05 -07:00
debug-pagealloc.c
dmapool.c	mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()	2011-01-13 17:32:48 -08:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap_xip.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap.c	mm: don't return 0 too early from find_get_pages()	2011-03-22 17:44:04 -07:00
fremap.c	Avoid pgoff overflow in remap_file_pages	2010-09-25 09:34:58 -07:00
highmem.c	mm,x86: fix kmap_atomic_push vs ioremap_32.c	2010-10-27 18:03:05 -07:00
huge_memory.c	mm: use __GFP_OTHER_NODE for transparent huge pages	2011-03-22 17:44:05 -07:00
hugetlb.c	hugetlbfs: correct handling of negative input to /proc/sys/vm/nr_hugepages	2011-03-22 17:44:04 -07:00
hwpoison-inject.c	HWPOISON, hugetlb: support hwpoison injection for hugepage	2010-08-11 09:23:11 +02:00
init-mm.c	mm: provide init_mm mm_context initializer	2010-08-09 20:44:54 -07:00
internal.h	mm: export __get_user_pages	2011-03-17 13:08:27 -03:00
Kconfig	mm: compaction: don't depend on HUGETLB_PAGE	2011-01-26 10:50:02 +10:00
Kconfig.debug	mm: debug-pagealloc: fix kconfig dependency warning	2011-03-22 17:44:02 -07:00
kmemcheck.c	kmemcheck: Fix build errors due to missing slab.h	2010-03-30 22:02:32 +09:00
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	kmemleak: Allow kmemleak metadata allocations to fail	2011-01-27 18:32:06 +00:00
ksm.c	mm: rename drop_anon_vma() to put_anon_vma()	2011-03-22 17:44:03 -07:00
maccess.c	MN10300: Save frame pointer in thread_info struct rather than global var	2010-10-27 17:29:01 +01:00
madvise.c	thp: khugepaged: make khugepaged aware about madvise	2011-01-13 17:32:47 -08:00
Makefile	bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c	2011-02-24 14:43:05 +01:00
memblock.c	memblock: don't adjust size in memblock_find_base()	2011-02-11 16:12:20 -08:00
memcontrol.c	pagewalk: only split huge pages when necessary	2011-03-22 17:44:04 -07:00
memory_hotplug.c	Merge branch 'slub/hotplug' into slab/urgent	2011-01-15 13:28:17 +02:00
memory-failure.c	mm: change __remove_from_page_cache()	2011-03-22 17:44:02 -07:00
memory.c	mm: allow GUP to fail instead of waiting on a page	2011-03-22 17:44:02 -07:00
mempolicy.c	mempolicy: remove redundant check in __mpol_equal()	2011-03-22 17:44:04 -07:00
mempool.c
migrate.c	mm: compaction: Use async migration for __GFP_NO_KSWAPD and enforce no writeback	2011-03-22 17:44:05 -07:00
mincore.c	thp: mincore transparent hugepage support	2011-01-13 17:32:44 -08:00
mlock.c	mlock: operate on any regions with protection != PROT_NONE	2011-02-02 10:20:50 +11:00
mm_init.c
mmap.c	brk: fix min_brk lower bound computation for COMPAT_BRK	2011-01-13 17:32:48 -08:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	thp: mmu_notifier_test_young	2011-01-13 17:32:46 -08:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	mm: fix possible cause of a page_mapped BUG	2011-02-23 21:55:06 -08:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nobootmem.c	bootmem: Move __alloc_memory_core_early() to nobootmem.c	2011-02-24 14:43:06 +01:00
nommu.c	mlock: do not hold mmap_sem for extended periods of time	2011-01-13 17:32:36 -08:00
oom_kill.c	oom: suppress nodes that are not allowed from meminfo on oom kill	2011-03-22 17:44:01 -07:00
page_alloc.c	mm: add __GFP_OTHER_NODE flag	2011-03-22 17:44:05 -07:00
page_cgroup.c	mm: notifier_from_errno() cleanup	2011-03-22 17:44:01 -07:00
page_io.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
page_isolation.c	mm: page_isolation: codeclean fix comment and rm unneeded val init	2010-10-26 16:52:11 -07:00
page-writeback.c	mm: reclaim invalidated page ASAP	2011-03-22 17:44:04 -07:00
pagewalk.c	pagewalk: only split huge pages when necessary	2011-03-22 17:44:04 -07:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	mm: remove gfp mask from pcpu_get_vm_areas	2011-01-13 17:32:34 -08:00
percpu.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2011-01-13 10:05:56 -08:00
pgtable-generic.c	mm/pgtable-generic.c: fix CONFIG_SWAP=n build	2011-01-26 10:49:58 +10:00
prio_tree.c
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	readahead.c: fix comment	2010-05-25 08:07:00 -07:00
rmap.c	mm: simplify anon_vma refcounts	2011-03-22 17:44:03 -07:00
shmem.c	mm: shmem: change remove_from_page_cache	2011-03-22 17:44:02 -07:00
slab.c	mm: notifier_from_errno() cleanup	2011-03-22 17:44:01 -07:00
slob.c	mm: Remove support for kmem_cache_name()	2011-01-23 21:00:05 +02:00
slub.c	slub: Add statistics for this_cmpxchg_double failures	2011-03-22 20:48:04 +02:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	thp: remove PG_buddy	2011-01-13 17:32:43 -08:00
swap_state.c	thp: split_huge_page paging	2011-01-13 17:32:41 -08:00
swap.c	mm: reclaim invalidated page ASAP	2011-03-22 17:44:04 -07:00
swapfile.c	sys_swapon: use vzalloc() instead of vmalloc/memset	2011-03-22 17:44:05 -07:00
thrash.c
truncate.c	mm: deactivate invalidated pages	2011-03-22 17:44:03 -07:00
util.c	kernel: kmem_ptr_validate considered harmful	2011-01-07 17:50:16 +11:00
vmalloc.c	mm: vmap area cache	2011-03-22 17:44:00 -07:00
vmscan.c	mm: vmscan: kswapd should not free an excessive number of pages when balancing small zones	2011-03-22 17:44:04 -07:00
vmstat.c	mm: add __GFP_OTHER_NODE flag	2011-03-22 17:44:05 -07:00