Tejun Heo 0415b00d17 percpu: Always align percpu output section to PAGE_SIZE ... Percpu allocator honors alignment request upto PAGE_SIZE and both the percpu addresses in the percpu address space and the translated kernel addresses should be aligned accordingly. The calculation of the former depends on the alignment of percpu output section in the kernel image. The linker script macros PERCPU_VADDR() and PERCPU() are used to define this output section and the latter takes @align parameter. Several architectures are using @align smaller than PAGE_SIZE breaking percpu memory alignment. This patch removes @align parameter from PERCPU(), renames it to PERCPU_SECTION() and makes it always align to PAGE_SIZE. While at it, add PCPU_SETUP_BUG_ON() checks such that alignment problems are reliably detected and remove percpu alignment comment recently added in workqueue.c as the condition would trigger BUG way before reaching there. For um, this patch raises the alignment of percpu area. As the area is in .init, there shouldn't be any noticeable difference. This problem was discovered by David Howells while debugging boot failure on mn10300. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: uclinux-dist-devel@blackfin.uclinux.org Cc: David Howells <dhowells@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: user-mode-linux-devel@lists.sourceforge.net		2011-03-24 18:50:09 +01:00
..
backing-dev.c	fs: assign sb->s_bdi to default_backing_dev_info if the bdi is going away	2011-03-17 11:13:12 +01:00
bootmem.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
bounce.c
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
failslab.c
filemap.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
filemap_xip.c
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
init-mm.c
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
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	mm/memblock: properly handle overlaps and fix error path	2011-03-22 17:44:09 -07:00
memcontrol.c	memcg: fix leak on wrong LRU with FUSE	2011-03-23 19:46:33 -07:00
memory-failure.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
memory.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-03-23 20:51:42 -07:00
memory_hotplug.c	Merge branch 'slub/hotplug' into slab/urgent	2011-01-15 13:28:17 +02:00
mempolicy.c	mempolicy: remove redundant check in __mpol_equal()	2011-03-22 17:44:04 -07:00
mempool.c
migrate.c	memcg: fix ugly initialization of return value is in caller	2011-03-23 19:46:22 -07:00
mincore.c	thp: mincore transparent hugepage support	2011-01-13 17:32:44 -08:00
mlock.c	mm: arch: make get_gate_vma take an mm_struct instead of a task_struct	2011-03-23 16:36:54 -04:00
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
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
nobootmem.c	crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn	2011-03-23 19:47:19 -07:00
nommu.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
oom_kill.c	memcg: give current access to memory reserves if it's trying to die	2011-03-23 19:46:33 -07:00
page-writeback.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
page_alloc.c	memcg: add memcg sanity checks at allocating and freeing pages	2011-03-23 19:46:25 -07:00
page_cgroup.c	memcg: page_cgroup array is never stored on reserved pages	2011-03-23 19:46:33 -07:00
page_io.c	block: kill off REQ_UNPLUG	2011-03-10 08:52:27 +01:00
page_isolation.c	mm: page_isolation: codeclean fix comment and rm unneeded val init	2010-10-26 16:52:11 -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	percpu: Always align percpu output section to PAGE_SIZE	2011-03-24 18:50:09 +01:00
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
readahead.c	read-ahead: use plugging	2011-03-10 08:52:26 +01:00
rmap.c	mm: simplify anon_vma refcounts	2011-03-22 17:44:03 -07:00
shmem.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -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.c	mm: simplify code of swap.c	2011-03-22 17:44:09 -07:00
swap_state.c	block: remove per-queue plugging	2011-03-10 08:52:07 +01:00
swapfile.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -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	vmalloc: remove confusing comment on vwrite()	2011-03-22 17:44:09 -07:00
vmscan.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	2011-03-24 10:16:26 -07:00
vmstat.c	mm: add __GFP_OTHER_NODE flag	2011-03-22 17:44:05 -07:00