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Mark Salter 7e1f28ef34 BACKPORT: mm: create generic early_ioremap() support 
This patch creates a generic implementation of early_ioremap() support
based on the existing x86 implementation.  early_ioremp() is useful for
early boot code which needs to temporarily map I/O or memory regions
before normal mapping functions such as ioremap() are available.

Some architectures have optional MMU.  In the no-MMU case, the remap
functions simply return the passed in physical address and the unmap
functions do nothing.

Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 9e5c33d7ae)
Signed-off-by: David Riley <davidriley@chromium.org>

Change-Id: I9a07d5eaa3b9500f92162e07a75a755418890be7
Reviewed-on: https://chromium-review.googlesource.com/206121
Reviewed-by: Olof Johansson <olofj@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Commit-Queue: David Riley <davidriley@chromium.org>
2014-07-03 19:44:41 +00:00
..
backing-dev.c
CHROMIUM: backing_dev: Fix hung task on sync
2014-05-07 17:26:27 -07:00
balloon_compaction.c
mm: print more details for bad_page()
2014-01-23 16:36:50 -08:00
bootmem.c
mm/bootmem.c: remove unused local `map'
2013-11-13 12:09:09 +09:00
bounce.c
block: Convert bio_for_each_segment() to bvec_iter
2013-11-23 22:33:49 -08:00
cleancache.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
compaction.c
mm/compaction: break out of loop on !PageBuddy in isolate_freepages_block
2014-03-10 17:26:20 -07:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
dmapool: make DMAPOOL_DEBUG detect corruption of free marker
2012-12-11 17:22:24 -08:00
early_ioremap.c
BACKPORT: mm: create generic early_ioremap() support
2014-07-03 19:44:41 +00:00
fadvise.c
teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
2013-03-03 22:46:22 -05:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
seqcount: Add lockdep functionality to seqcount/seqlock structures
2013-11-06 12:40:26 +01:00
filemap.c
fix O_SYNC|O_APPEND syncing the wrong range on write()
2014-02-09 15:18:09 -05:00
fremap.c
mm: fix bad rss-counter if remap_file_pages raced migration
2014-03-19 16:21:49 -07:00
frontswap.c
frontswap: fix incorrect zeroing and allocation size for frontswap_map
2013-06-12 16:29:46 -07:00
highmem.c
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2012-12-20 08:37:05 -08:00
huge_memory.c
mm: include VM_MIXEDMAP flag in the VM_SPECIAL list to avoid m(un)locking
2014-03-04 07:55:48 -08:00
hugetlb_cgroup.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
hugetlb.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
hwpoison-inject.c
mm/hwpoison: add '#' to hwpoison_inject
2014-01-21 16:19:48 -08:00
init-mm.c
…
internal.h
CHROMIUM: ARM: Speed up page list initialization during boot
2014-05-07 17:26:30 -07:00
interval_tree.c
mm: add CONFIG_DEBUG_VM_RB build option
2012-10-09 16:22:42 +09:00
Kconfig
BACKPORT: mm: create generic early_ioremap() support
2014-07-03 19:44:41 +00:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c
mm: kmemleak: avoid false negatives on vmalloc'ed objects
2013-11-13 12:09:07 +09:00
ksm.c
mm: close PageTail race
2014-03-04 07:55:47 -08:00
list_lru.c
mm: list_lru: fix almost infinite loop causing effective livelock
2013-10-30 12:57:46 -07:00
low-mem-notify.c
CHROMIUM: low-mem: add "on" command and fix error case
2014-05-14 17:55:02 -07:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
mm/hwpoison: fix traversal of hugetlbfs pages to avoid printk flood
2013-09-30 14:31:02 -07:00
Makefile
BACKPORT: mm: create generic early_ioremap() support
2014-07-03 19:44:41 +00:00
memblock.c
memblock: add limit checking to memblock_virt_alloc
2014-01-29 16:22:40 -08:00
memcontrol.c
memcg: reparent charges of children before processing parent
2014-03-04 07:55:48 -08:00
memory_hotplug.c
mm/memory_hotplug.c: move register_memory_resource out of the lock_memory_hotplug
2014-01-23 16:36:52 -08:00
memory-failure.c
mm: close PageTail race
2014-03-04 07:55:47 -08:00
memory.c
mm, thp: fix infinite loop on memcg OOM
2014-02-25 15:25:44 -08:00
mempolicy.c
mm/mempolicy.c: fix mempolicy printing in numa_maps
2014-01-30 16:56:56 -08:00
mempool.c
mm/mempool.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)
2013-09-11 15:58:14 -07:00
migrate.c
mm: fix swapops.h:131 bug if remap_file_pages raced migration
2014-03-20 22:09:09 -07:00
mincore.c
mm: do_mincore() cleanup
2014-01-23 16:36:52 -08:00
mlock.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
mm_init.c
mm: bring back /sys/kernel/mm
2014-01-27 21:02:39 -08:00
mmap.c
CHROMIUM: mmap, sysctl: add sysctl for controlling VM_MAYEXEC taint
2014-04-08 14:58:20 -07:00
mmu_context.c
mm: remove old aio use_mm() comment
2013-05-07 18:38:27 -07:00
mmu_notifier.c
mm: audit/fix non-modular users of module_init in core code
2014-01-23 16:36:52 -08:00
mmzone.c
mm: numa: Change page last {nid,pid} into {cpu,pid}
2013-10-09 14:47:45 +02:00
mprotect.c
mm: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit
2014-02-17 11:19:36 +11:00
mremap.c
mm: revert mremap pud_free anti-fix
2013-10-16 21:35:53 -07:00
msync.c
…
nobootmem.c
mm/nobootmem: free_all_bootmem again
2014-01-23 16:36:52 -08:00
nommu.c
mm: add overcommit_kbytes sysctl variable
2014-01-21 16:19:44 -08:00
oom_kill.c
mm, oom: base root bonus on current usage
2014-01-30 16:56:56 -08:00
page_alloc.c
CHROMIUM: Add /dev/low-mem device for low-memory notification.
2014-05-14 17:54:55 -07:00
page_cgroup.c
Merge branch 'akpm' (incoming from Andrew)
2014-01-21 19:05:45 -08:00
page_io.c
Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block
2014-01-30 11:19:05 -08:00
page_isolation.c
mm: memory-hotplug: enable memory hotplug to handle hugepage
2013-09-11 15:57:48 -07:00
page-writeback.c
mm: __set_page_dirty_nobuffers() uses spin_lock_irqsave() instead of spin_lock_irq()
2014-02-06 13:48:51 -08:00
pagewalk.c
mm/pagewalk.c: fix walk_page_range() access of wrong PTEs
2013-10-30 14:27:03 -07:00
percpu-km.c
…
percpu-vm.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu.c
Merge branch 'akpm' (incoming from Andrew)
2014-01-21 19:05:45 -08:00
pgtable-generic.c
mm: fix TLB flush race between migration, and change_protection_range
2013-12-18 19:04:51 -08:00
process_vm_access.c
Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys
2013-03-12 11:05:45 -07:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
mm/readahead.c: fix do_readahead() for no readpage(s)
2014-01-29 16:22:40 -08:00
rmap.c
mm: fix swapops.h:131 bug if remap_file_pages raced migration
2014-03-20 22:09:09 -07:00
shmem.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-01-28 08:38:04 -08:00
slab_common.c
slab: fix wrong retval on kmem_cache_create_memcg error path
2014-01-29 16:22:40 -08:00
slab.c
mm: Fix warning on make htmldocs caused by slab.c
2014-01-31 13:52:25 +02:00
slab.h
memcg, slab: RCU protect memcg_params for root caches
2014-01-23 16:36:51 -08:00
slob.c
mm/sl[aou]b: Move kmallocXXX functions to common code
2013-09-04 20:51:33 +03:00
slub.c
slub: do not assert not having lock in removing freed partial
2014-02-10 16:01:42 -08:00
sparse-vmemmap.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
sparse.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
swap_state.c
swap: add a simple detector for inappropriate swapin readahead
2014-02-06 13:48:51 -08:00
swap.c
mm: close PageTail race
2014-03-04 07:55:47 -08:00
swapfile.c
CHROMIUM: Restrict swapon() to "zram" devices / lock down zram
2014-05-07 17:06:02 -07:00
truncate.c
truncate: drop 'oldsize' truncate_pagecache() parameter
2013-09-12 15:38:02 -07:00
util.c
mm: add overcommit_kbytes sysctl variable
2014-01-21 16:19:44 -08:00
vmalloc.c
Revert "mm/vmalloc: interchage the implementation of vmalloc_to_{pfn,page}"
2014-01-27 21:02:39 -08:00
vmpressure.c
arm, pm, vmpressure: add missing slab.h includes
2014-02-03 13:24:01 -05:00
vmscan.c
CHROMIUM: vmscan: add min_filelist_kbytes sysctl for protecting the working set
2014-05-14 17:54:58 -07:00
vmstat.c
mm, x86: Account for TLB flushes only when debugging
2014-01-25 09:10:41 +01:00
zbud.c
mm/zbud: fix some trivial typos in comments
2013-09-11 15:57:35 -07:00
zsmalloc.c
zsmalloc: add copyright
2014-01-30 16:56:55 -08:00
zswap.c
mm/zswap.c: change params from hidden to ro
2014-01-23 16:36:50 -08:00