Mark Salter 6b0f68e32e mm: add utility for early copy from unmapped ram ... When booting an arm64 kernel w/initrd using UEFI/grub, use of mem= will likely cut off part or all of the initrd. This leaves it outside the kernel linear map which leads to failure when unpacking. The x86 code has a similar need to relocate an initrd outside of mapped memory in some cases. The current x86 code uses early_memremap() to copy the original initrd from unmapped to mapped RAM. This patchset creates a generic copy_from_early_mem() utility based on that x86 code and has arm64 and x86 share it in their respective initrd relocation code. This patch (of 3): In some early boot circumstances, it may be necessary to copy from RAM outside the kernel linear mapping to mapped RAM. The need to relocate an initrd is one example in the x86 code. This patch creates a helper function based on current x86 code. Signed-off-by: Mark Salter <msalter@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-09-08 15:35:28 -07:00
..
kasan	x86/kasan, mm: Introduce generic kasan_populate_zero_shadow()	2015-08-22 14:54:55 +02:00
backing-dev.c	inode: rename i_wb_list to i_io_list	2015-08-17 23:38:10 -04:00
balloon_compaction.c
bootmem.c	bootmem: avoid freeing to bootmem after bootmem is done	2015-09-08 15:35:28 -07:00
cleancache.c
cma_debug.c	mm/cma_debug: correct size input to bitmap function	2015-07-17 16:39:54 -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: mark cma_bitmap_maxno() inline in header	2015-08-14 15:56:32 -07:00
compaction.c	mm, compaction: skip compound pages by order in free scanner	2015-09-08 15:35:28 -07:00
debug-pagealloc.c
debug.c	tracing: Rename ftrace_event.h to trace_events.h	2015-05-13 14:05:12 -04:00
dmapool.c	mm: add support for __GFP_ZERO flag to dma_pool_alloc()	2015-09-08 15:35:28 -07:00
early_ioremap.c	mm: add utility for early copy from unmapped ram	2015-09-08 15:35:28 -07:00
fadvise.c	writeback: implement and use inode_congested()	2015-06-02 08:33:35 -06:00
failslab.c
filemap.c	fs: do not prefault sys_write() user buffer pages	2015-09-08 15:35:28 -07:00
frontswap.c	frontswap: allow multiple backends	2015-06-24 17:49:45 -07:00
gup.c	mm: make GUP handle pfn mapping unless FOLL_GET is requested	2015-09-04 16:54:41 -07:00
highmem.c
huge_memory.c	mm: make set_recommended_min_free_kbytes() return void	2015-09-08 15:35:28 -07:00
hugetlb_cgroup.c
hugetlb.c	hugetlbfs: add hugetlbfs_fallocate()	2015-09-08 15:35:28 -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: defer flush of writable TLB entries	2015-09-04 16:54:41 -07:00
interval_tree.c
Kconfig	mm/Kconfig: NEED_BOUNCE_POOL: clean-up condition	2015-07-23 20:59:41 +02:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc()	2015-06-24 17:49:46 -07:00
ksm.c
list_lru.c
maccess.c	lib: move strncpy_from_unsafe() into mm/maccess.c	2015-08-31 12:36:10 -07:00
madvise.c	mm: madvise allow remove operation for hugetlbfs	2015-09-08 15:35:28 -07:00
Makefile	userfaultfd: mcopy_atomic|mfill_zeropage: UFFDIO_COPY|UFFDIO_ZEROPAGE preparation	2015-09-04 16:54:41 -07:00
memblock.c	mem-hotplug: handle node hole when initializing numa_meminfo.	2015-09-08 15:35:28 -07:00
memcontrol.c	memcg: move memcg_proto_active from sock.h	2015-09-08 15:35:28 -07:00
memory_hotplug.c	memory-hotplug: add hot-added memory ranges to memblock before allocate node_data for a node.	2015-09-04 16:54:41 -07:00
memory-failure.c	memcg: export struct mem_cgroup	2015-09-08 15:35:28 -07:00
memory.c	mm, dax: use i_mmap_unlock_write() in do_cow_fault()	2015-09-08 15:35:28 -07:00
mempolicy.c	mm/mempolicy.c: get rid of duplicated check for vma(VM_PFNMAP) in queue_pages_range()	2015-09-08 15:35:28 -07:00
mempool.c	mm/mempool: allow NULL `pool' pointer in mempool_destroy()	2015-09-08 15:35:28 -07:00
memtest.c	memtest: remove unused header files	2015-09-08 15:35:28 -07:00
migrate.c	mm: fix status code which move_pages() returns for zero page	2015-09-04 16:54:41 -07:00
mincore.c
mlock.c	userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx	2015-09-04 16:54:41 -07:00
mm_init.c	mm: meminit: remove mminit_verify_page_links	2015-06-30 19:44:56 -07:00
mmap.c	mremap: fix the wrong !vma->vm_file check in copy_vma()	2015-09-08 15:35:28 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx	2015-09-04 16:54:41 -07:00
mremap.c	mremap: simplify the "overlap" check in mremap_to()	2015-09-04 16:54:41 -07:00
msync.c
nobootmem.c	mm: page_alloc: pass PFN to __free_pages_bootmem	2015-06-30 19:44:55 -07:00
nommu.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-09-01 18:46:42 -07:00
oom_kill.c	mm, oom: remove unnecessary variable	2015-09-08 15:35:28 -07:00
page_alloc.c	mm: rename and move get/set_freepage_migratetype	2015-09-08 15:35:28 -07:00
page_counter.c
page_ext.c
page_io.c	fs: use helper bio_add_page() instead of open coding on bi_io_vec	2015-08-13 12:32:00 -06:00
page_isolation.c	mm, page_isolation: make set/unset_migratetype_isolate() file-local	2015-09-08 15:35:28 -07:00
page_owner.c	mm/page_owner: set correct gfp_mask on page_owner	2015-07-17 16:39:54 -07:00
page-writeback.c	writeback: fix initial dirty limit	2015-08-07 04:39:42 +03:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	percpu: clean up of schunk->map[] assignment in pcpu_setup_first_chunk	2015-07-21 11:31:00 -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
quicklist.c
readahead.c	writeback: implement and use inode_congested()	2015-06-02 08:33:35 -06:00
rmap.c	mm: defer flush of writable TLB entries	2015-09-04 16:54:41 -07:00
shmem.c	ipc: use private shmem or hugetlbfs inodes for shm segments.	2015-08-07 04:39:41 +03:00
slab_common.c	memcg: export struct mem_cgroup	2015-09-08 15:35:28 -07:00
slab.c	slab: infrastructure for bulk object allocation and freeing	2015-09-04 16:54:41 -07:00
slab.h	mm/slab.h: fix argument order in cache_from_obj's error message	2015-09-04 16:54:41 -07:00
slob.c	slab: infrastructure for bulk object allocation and freeing	2015-09-04 16:54:41 -07:00
slub.c	mm/slub: don't wait for high-order page allocation	2015-09-04 16:54:41 -07:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_state.c
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: /proc/pid/smaps:: show proportional swap share of the mapping	2015-09-08 15:35:28 -07:00
truncate.c	memcg: add per cgroup dirty page accounting	2015-06-02 08:33:33 -06:00
userfaultfd.c	userfaultfd: avoid mmap_sem read recursion in mcopy_atomic	2015-09-04 16:54:41 -07:00
util.c
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c	vmscan: fix increasing nr_isolated incurred by putback unevictable pages	2015-09-08 15:35:28 -07:00
vmstat.c
workingset.c
zbud.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zpool.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zsmalloc.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zswap.c	zswap: runtime enable/disable	2015-06-25 17:00:37 -07:00