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linux/arch/arm/include/asm
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Will Deacon f5f2025ef3 ARM: 7488/1: mm: use 5 bits for swapfile type encoding 
Page migration encodes the pfn in the offset field of a swp_entry_t.
For LPAE, we support physical addresses of up to 36 bits (due to
sparsemem limitations with the size of page flags), requiring 24 bits
to represent a pfn. A further 3 bits are used to encode a swp_entry into
a pte, leaving 5 bits for the type field. Furthermore, the core code
defines MAX_SWAPFILES_SHIFT as 5, so the additional type bit does not
get used.

This patch reduces the width of the type field to 5 bits, allowing us
to create up to 31 swapfiles of 64GB each.

Cc: <stable@vger.kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-08-11 09:15:59 +01:00
..
hardware Viresh has moved 2012-06-20 14:39:36 -07:00
mach ARM: fiq: change FIQ_START to a variable 2012-07-01 21:59:19 +08:00
a.out-core.h ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump 2011-03-10 15:16:29 +00:00
a.out.h
arch_timer.h ARM: 7451/1: arch timer: implement read_current_timer and get_cycles 2012-07-09 17:42:23 +01:00
asm-offsets.h kbuild: move asm-offsets.h to include/generated 2009-12-12 13:08:14 +01:00
assembler.h ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
atomic.h ARM: fix warnings about atomic64_read 2012-07-05 13:06:32 +01:00
barrier.h ARM: OMAP2+: Fix omap2+ build error 2012-04-03 10:59:10 -07:00
bitops.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
bug.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
bugs.h
byteorder.h
cache.h ARM: implement support for read-mostly sections 2010-12-05 08:39:36 +00:00
cacheflush.h ARM: 7479/1: mm: avoid NULL dereference when flushing gate_vma with VIVT caches 2012-07-31 12:04:47 +01:00
cachetype.h ARM: 7062/1: cache: detect PIPT I-cache using CTR 2011-10-17 09:13:41 +01:00
checksum.h
clkdev.h ARM: Consolidate the clkdev header files 2011-07-19 18:09:45 +02:00
cmpxchg.h ARM: 7404/1: cmpxchg64: use atomic64 and local64 routines for cmpxchg64 2012-04-28 17:32:44 +01:00
compiler.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
cp15.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
cpu.h arm: Use generic idle thread allocation 2012-04-26 12:06:11 +02:00
cpuidle.h cpuidle: Add common time keeping and irq enabling 2012-03-21 01:59:40 -04:00
cputype.h ARM: 7011/1: Add ARM cpu topology definition 2011-10-17 09:02:43 +01:00
cti.h arm: introduce cross trigger interface helpers 2011-12-02 15:16:33 +00:00
current.h
delay.h ARM: 7452/1: delay: allow timer-based delay implementation to be selected 2012-07-09 17:42:23 +01:00
device.h ARM: dma-mapping: add support for IOMMU mapper 2012-05-21 15:06:23 +02:00
div64.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
dma-contiguous.h ARM: integrate CMA with DMA-mapping subsystem 2012-05-21 15:09:38 +02:00
dma-iommu.h ARM: dma-mapping: add support for IOMMU mapper 2012-05-21 15:06:23 +02:00
dma-mapping.h ARM: dma-mapping: add support for dma_get_sgtable() 2012-07-30 12:25:47 +02:00
dma.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
domain.h ARM: fix set_domain() macro 2012-07-05 09:50:55 +01:00
ecard.h ARM: io: ecard: move ioaddr() inside __ecard_address 2011-08-17 08:44:16 +01:00
edac.h ARM: 7201/1: add EDAC atomic_scrub function 2011-12-11 08:35:50 +00:00
elf.h ARM: 7294/1: vectors: use gate_vma for vectors user mapping 2012-03-24 09:38:51 +00:00
entry-macro-multi.S ARM: gic: consolidate PPI handling 2011-10-23 13:32:29 +01:00
exception.h ARM: 7115/4: move __exception and friends to asm/exception.h 2011-10-17 09:02:44 +01:00
exec.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
fb.h
fcntl.h
fiq.h ARM: 6940/1: fiq: Briefly document driver responsibilities for suspend/resume 2011-05-26 10:31:06 +01:00
fixmap.h
flat.h
floppy.h
fncpy.h ARM: 6640/1: Thumb-2: Symbol manipulation macros for function body copying 2011-01-27 11:48:58 +00:00
fpstate.h Fix common misspellings 2011-03-31 11:26:23 -03:00
ftrace.h ARM: 6319/1: ftrace: add Thumb-2 support to dynamic ftrace 2010-09-02 15:28:43 +01:00
futex.h ARM: 7425/1: extable: ensure fixup entries are 4-byte aligned 2012-06-16 16:30:25 +01:00
glue-cache.h Fix common misspellings 2011-03-31 11:26:23 -03:00
glue-df.h ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs 2012-05-05 05:50:50 +01:00
glue-pf.h ARM: move cache/processor/fault glue to separate include files 2011-02-12 11:52:21 +00:00
glue-proc.h ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs 2012-05-05 05:50:50 +01:00
glue.h Fix common misspellings 2011-03-31 11:26:23 -03:00
gpio.h ARM: 7271/1: Fix typo in conversion of ARCH_NR_GPIOS to Kconfig 2012-01-08 09:27:19 +00:00
hardirq.h ARM: 7140/1: remove NR_IRQS dependency for ARM-specific HARDIRQ_BITS definition 2011-12-06 11:14:01 +00:00
highmem.h highmem: kill all __kmap_atomic() 2012-03-20 21:48:30 +08:00
hw_breakpoint.h ARM: hw_breakpoint: add support for multiple watchpoints 2011-08-31 10:42:48 +01:00
hw_irq.h arm: dove: Use proper irq accessor functions 2011-03-29 14:47:57 +02:00
hwcap.h UAPI: Split trivial #if defined(__KERNEL__) && X conditionals 2011-12-13 15:07:49 +00:00
ide.h
idmap.h ARM: SMP: use idmap_pgd for mapping MMU enable during secondary booting 2011-12-06 14:04:15 +00:00
io.h ARM: fix out[bwl]() 2012-05-25 08:39:25 +01:00
ioctls.h ioctl: Use asm-generic/ioctls.h on arm (enables termiox) 2010-10-22 10:19:59 -07:00
ipcbuf.h consolidate a bunch of ipcbuf.h instances 2012-01-03 22:55:18 -05:00
irq.h ARM: only include mach/irqs.h for !SPARSE_IRQ 2012-01-30 13:24:37 -06:00
irqflags.h Fix IRQ flag handling naming 2010-10-07 14:08:55 +01:00
jump_label.h ARM: 7386/1: jump_label: fixup for rename to static_key 2012-04-15 22:00:31 +01:00
Kbuild ARM: 7006/1: Migrate to asm-generic wrapper support 2011-10-17 09:12:40 +01:00
kexec.h [ARM] add machine-specific hook to machine_kexec 2011-03-03 16:26:55 -05:00
kgdb.h kgdb,arm: fix register dump 2010-10-29 13:14:40 -05:00
kmap_types.h arm: remove km_type definitions 2012-07-24 15:27:28 +08:00
kprobes.h Kernel: Audit Support For The ARM Platform 2012-01-17 16:17:01 -05:00
kvm_para.h kvmclock: Add functions to check if the host has stopped the vm 2012-04-08 12:48:59 +03:00
leds.h
limits.h
linkage.h
localtimer.h ARM: local timers: make the runtime registration interface mandatory 2012-03-13 13:45:55 +00:00
mach-types.h arm: move mach-types to include/generated 2009-12-12 13:08:14 +01:00
mc146818rtc.h ARM: mc146818rtc: remove unnecessary include of mach/irqs.h 2012-01-25 20:37:45 -06:00
memblock.h ARM: Add arm_memblock_steal() to allocate memory away from the kernel 2012-01-13 15:02:35 +00:00
memory.h ARM: 7432/1: use the new linux/sizes.h 2012-06-28 17:14:35 +01:00
mman.h arm: add arch_mmap_check(), get rid of sys_arm_mremap() 2009-12-11 06:34:09 -05:00
mmu_context.h ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on pre-ARMv6 CPUs 2012-04-17 15:29:44 +01:00
mmu.h ARM: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW on pre-ARMv6 CPUs 2012-04-17 15:29:44 +01:00
module.h ARM: 7013/1: P2V: Remove ARM_PATCH_PHYS_VIRT_16BIT 2011-08-13 11:26:40 +01:00
msgbuf.h
mtd-xip.h
mutex.h ARM: 7467/1: mutex: use generic xchg-based implementation for ARMv6+ 2012-07-31 10:30:41 +01:00
nwflash.h
opcodes.h ARM: 7311/1: Add generic instruction opcode manipulation helpers 2012-03-24 09:38:51 +00:00
outercache.h ARM: 7114/1: cache-l2x0: add resume entry for l2 in secure mode 2011-10-17 09:11:51 +01:00
page-nommu.h
page.h ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs 2012-05-05 05:50:50 +01:00
param.h
parport.h
pci.h PCI: collapse pcibios_resource_to_bus 2012-02-23 20:19:04 -07:00
perf_event.h ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
pgalloc.h ARM: LPAE: Page table maintenance for the 3-level format 2011-12-08 10:30:39 +00:00
pgtable-2level-hwdef.h ARM: 7077/1: LPAE: Use a mask for physical addresses in page table entries 2011-10-06 15:40:06 +01:00
pgtable-2level-types.h ARM: 7076/1: LPAE: Add (pte|pmd)val_t type definitions as u32 2011-10-06 15:40:05 +01:00
pgtable-2level.h ARM: LPAE: Move page table maintenance macros to pgtable-2level.h 2011-12-08 10:30:37 +00:00
pgtable-3level-hwdef.h ARM: LPAE: Introduce the 3-level page table format definitions 2011-12-08 10:30:39 +00:00
pgtable-3level-types.h ARM: LPAE: Introduce the 3-level page table format definitions 2011-12-08 10:30:39 +00:00
pgtable-3level.h ARM: 7416/1: LPAE: Remove unused L_PTE_(BUFFERABLE|CACHEABLE) macros 2012-05-12 14:38:21 +01:00
pgtable-hwdef.h ARM: LPAE: Introduce the 3-level page table format definitions 2011-12-08 10:30:39 +00:00
pgtable-nommu.h Remove remaining bits of io_remap_page_range() 2012-03-23 16:58:31 -07:00
pgtable.h ARM: 7488/1: mm: use 5 bits for swapfile type encoding 2012-08-11 09:15:59 +01:00
pmu.h ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
posix_types.h bury __kernel_nlink_t, make internal nlink_t consistent 2012-05-30 21:04:50 -04:00
proc-fns.h ARM: LPAE: Page table maintenance for the 3-level format 2011-12-08 10:30:39 +00:00
processor.h Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-05-23 10:59:07 -07:00
procinfo.h
prom.h ARM: get rid of asm/irq.h in asm/prom.h 2012-03-24 09:38:54 +00:00
ptrace.h ARM: 7374/1: add TRACEHOOK support 2012-04-25 19:49:28 +01:00
scatterlist.h ARM: Allow SoCs to enable scatterlist chaining 2011-06-02 11:16:22 +01:00
sched_clock.h ARM: 7486/1: sched_clock: update epoch_cyc on resume 2012-08-11 09:15:58 +01:00
seccomp.h ARM: SECCOMP support 2010-10-01 22:32:18 -04:00
segment.h
sembuf.h
serial.h
setup.h ARM: 7465/1: Handle >4GB memory sizes in device tree and mem=size@start option 2012-07-29 22:19:14 +01:00
shmbuf.h
shmparam.h
sigcontext.h
signal.h
smp_plat.h ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP 2012-01-23 10:20:05 +00:00
smp_scu.h ARM: pm: add function to set WFI low-power mode for SMP CPUs 2011-02-11 12:29:18 +00:00
smp_twd.h ARM: smp_twd: remove old local timer interface 2012-03-13 13:45:54 +00:00
smp.h ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP 2012-01-23 10:20:05 +00:00
socket.h net: Add framework to allow sending packets with customized CRC. 2012-02-24 01:37:35 -08:00
sockios.h
sparsemem.h
spinlock_types.h ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation 2012-07-09 17:41:10 +01:00
spinlock.h ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines 2012-07-09 17:41:10 +01:00
stackprotector.h ARM: initial stack protector (-fstack-protector) support 2010-06-14 21:31:00 -04:00
stacktrace.h
stat.h
statfs.h
string.h
suspend.h ARM: pm: preallocate a page table for suspend/resume 2011-09-20 23:33:36 +01:00
swab.h Merge branch 'for-next' of git://git.infradead.org/users/dhowells/linux-headers 2012-01-14 18:03:30 -08:00
switch_to.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
syscall.h ARM: 7373/1: add support for the generic syscall.h interface 2012-04-25 19:49:27 +01:00
system_info.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
system_misc.h Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
system.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
tcm.h ARM: 6985/1: export functions to determine the presence of I/DTCM 2011-07-06 20:49:45 +01:00
termbits.h tty: Add EXTPROC support for LINEMODE 2010-08-10 13:47:39 -07:00
termios.h
therm.h
thread_info.h ARM: 7443/1: Revert "new way of handling ERESTART_RESTARTBLOCK" 2012-07-05 09:50:56 +01:00
thread_notify.h ARM: 6867/1: Introduce THREAD_NOTIFY_COPY for copy_thread() hooks 2011-04-10 21:13:36 +01:00
timex.h ARM: 7451/1: arch timer: implement read_current_timer and get_cycles 2012-07-09 17:42:23 +01:00
tlb.h ARM: 7302/1: Add TLB flushing for both entries in a PMD 2012-02-02 17:37:42 +00:00
tlbflush.h ARM: Remove support for ARMv3 ARM610 and ARM710 CPUs 2012-05-05 05:50:50 +01:00
tls.h ARM: 7403/1: tls: remove covert channel via TPIDRURW 2012-04-28 11:01:30 +01:00
topology.h ARM: 7182/1: ARM cpu topology: fix warning 2011-11-30 23:55:21 +00:00
traps.h ARM: earlier initialization of vectors page 2012-01-23 10:24:11 +00:00
types.h consolidate umode_t declarations 2012-01-03 22:55:17 -05:00
uaccess.h ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions 2012-07-09 17:41:11 +01:00
ucontext.h Fix common misspellings 2011-03-31 11:26:23 -03:00
unaligned.h
unified.h ARM: make BSYM macro assembly only 2012-01-16 08:56:25 -06:00
unistd.h ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION 2012-07-30 17:25:21 -07:00
unwind.h ARM: 7187/1: fix unwinding for XIP kernels 2011-12-06 11:16:13 +00:00
user.h ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump 2011-03-10 15:16:29 +00:00
vfp.h
vfpmacros.h ARM: 6203/1: Make VFPv3 usable on ARMv6 2010-07-09 14:41:34 +01:00
vga.h ARM: set vga memory base at run-time 2011-07-12 11:19:29 -05:00
word-at-a-time.h ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs 2012-07-09 17:41:11 +01:00
xor.h