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1796316a8b
linux/mm
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Jan Beulich 1796316a8b x86: consolidate __swp_XXX() macros 
Impact: cleanup, code robustization

The __swp_...() macros silently relied upon which bits are used for
_PAGE_FILE and _PAGE_PROTNONE. After having changed _PAGE_PROTNONE in
our Xen kernel to no longer overlap _PAGE_PAT, live locks and crashes
were reported that could have been avoided if these macros properly
used the symbolic constants. Since, as pointed out earlier, for Xen
Dom0 support mainline likewise will need to eliminate the conflict
between _PAGE_PAT and _PAGE_PROTNONE, this patch does all the necessary
adjustments, plus it introduces a mechanism to check consistency
between MAX_SWAPFILES_SHIFT and the actual encoding macros.

This also fixes a latent bug in that x86-64 used a 6-bit mask in
__swp_type(), and if MAX_SWAPFILES_SHIFT was increased beyond 5 in (the
seemingly unrelated) linux/swap.h, this would have resulted in a
collision with _PAGE_FILE.

Non-PAE 32-bit code gets similarly adjusted for its pte_to_pgoff() and
pgoff_to_pte() calculations.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-16 18:34:51 +01:00
..
allocpercpu.c mm/allocpercpu.c: make 4 functions static 2008-07-26 12:00:12 -07:00
backing-dev.c mm/backing-dev.c: remove recently-added WARN_ON() 2008-12-10 08:01:52 -08:00
bootmem.c misc: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
bounce.c highmem: use bio_has_data() in the bounce path 2008-10-09 08:56:01 +02:00
dmapool.c dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too 2008-04-28 08:58:20 -07:00
fadvise.c Remove Andrew Morton's old email accounts 2008-10-16 11:21:32 -07:00
filemap_xip.c mm: xip/ext2 fix block allocation race 2008-08-20 15:40:32 -07:00
filemap.c fs: remove prepare_write/commit_write 2008-10-30 11:38:45 -07:00
fremap.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
highmem.c x86, pat: avoid highmem cache attribute aliasing 2008-08-15 17:22:57 +02:00
hugetlb.c hugetlb: make unmap_ref_private multi-size-aware 2008-11-12 17:17:16 -08:00
internal.h hugetlb: pull gigantic page initialisation out of the default path 2008-11-06 15:41:18 -08:00
Kconfig Unevictable LRU Infrastructure 2008-10-20 08:50:26 -07:00
maccess.c kgdb: fix optional arch functions and probe_kernel_* 2008-04-17 20:05:39 +02:00
madvise.c madvise: update function comment of madvise_dontneed 2008-07-30 09:41:45 -07:00
Makefile memcg: allocate all page_cgroup at boot 2008-10-20 08:52:39 -07:00
memcontrol.c memcg: fix page_cgroup allocation 2008-10-23 08:55:02 -07:00
memory_hotplug.c meminit section warnings 2008-11-30 10:03:35 -08:00
memory.c mm: remove duplicated #include's 2008-10-20 16:17:42 -07:00
mempolicy.c mm: move migrate_prep out from under mmap_sem 2008-11-06 15:41:18 -08:00
mempool.c spelling fixes: mm/ 2007-10-20 01:27:18 +02:00
migrate.c mm: no get_user/put_user while holding mmap_sem in do_pages_stat? 2008-12-10 08:01:53 -08:00
mincore.c mm: remove nopage 2008-04-28 08:58:18 -07:00
mlock.c unitialized return value in mm/mlock.c: __mlock_vma_pages_range() 2008-11-16 15:55:36 -08:00
mm_init.c mm: mminit_loglevel cannot be __meminitdata anymore 2008-08-20 15:40:30 -07:00
mmap.c parisc: fix find_extend_vma() breakage 2008-11-12 10:37:48 -08:00
mmu_notifier.c mmu-notifiers: core 2008-07-28 16:30:21 -07:00
mmzone.c mm: mark the correct zone as full when scanning zonelists 2008-09-13 14:41:52 -07:00
mprotect.c mmu-notifiers: core 2008-07-28 16:30:21 -07:00
mremap.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
msync.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
nommu.c nfsd: fix vm overcommit crash 2008-10-30 11:38:47 -07:00
oom_kill.c mm/oom_kill.c: fix badness() kerneldoc 2008-11-06 15:41:19 -08:00
page_alloc.c cpusets: update mems allowed in page allocator 2008-11-12 17:17:16 -08:00
page_cgroup.c page_cgroup should ignore empty nodes 2008-12-10 08:01:53 -08:00
page_io.c mm: fix PageUptodate data race 2008-02-05 09:44:19 -08:00
page_isolation.c memory hotplug: fix page_zone() calculation in test_pages_isolated() 2008-11-06 15:41:19 -08:00
page-writeback.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
pagewalk.c pagemap: pass mm into pagewalkers 2008-06-12 18:05:41 -07:00
pdflush.c Remove Andrew Morton's old email accounts 2008-10-16 11:21:32 -07:00
prio_tree.c spelling fixes: mm/ 2007-10-20 01:27:18 +02:00
quicklist.c mm: size of quicklists shouldn't be proportional to the number of CPUs 2008-09-02 19:21:38 -07:00
readahead.c vmscan: split LRU lists into anon & file sets 2008-10-20 08:50:25 -07:00
rmap.c make mm/rmap.c:anon_vma_cachep static 2008-10-20 08:52:40 -07:00
shmem_acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
shmem.c nfsd: fix vm overcommit crash 2008-10-30 11:38:47 -07:00
slab.c proc: move /proc/slabinfo boilerplate to mm/slub.c, mm/slab.c 2008-10-23 15:20:06 +04:00
slob.c SLOB: fix bogus ksize calculation fix 2008-10-09 12:18:27 -07:00
slub.c KSYM_SYMBOL_LEN fixes 2008-12-10 08:01:54 -08:00
sparse-vmemmap.c vmemmap: warn about page_structs with remote distance 2008-11-06 15:41:19 -08:00
sparse.c meminit section warnings 2008-11-30 10:03:35 -08:00
swap_state.c mm: pagecache insertion fewer atomics 2008-10-20 08:52:31 -07:00
swap.c mm: remove UP version of lru_add_drain_all() 2008-12-10 08:01:53 -08:00
swapfile.c x86: consolidate __swp_XXX() macros 2008-12-16 18:34:51 +01:00
thrash.c Bug in mm/thrash.c function grab_swap_token() 2007-05-11 08:29:32 -07:00
tiny-shmem.c Export tiny shmem_file_setup for DRM-GEM 2008-10-20 16:17:42 -07:00
truncate.c mmap: handle mlocked pages during map, remap, unmap 2008-10-20 08:52:31 -07:00
util.c mm: Make generic weak get_user_pages_fast and EXPORT_GPL it 2008-08-12 17:52:53 +10:00
vmalloc.c KSYM_SYMBOL_LEN fixes 2008-12-10 08:01:54 -08:00
vmscan.c vmscan: protect zone rotation stats by lru lock 2008-12-01 07:58:06 -08:00
vmstat.c proc: move /proc/zoneinfo boilerplate to mm/vmstat.c 2008-10-23 17:35:04 +04:00