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Russell King 4b3073e1c5 MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself 
On VIVT ARM, when we have multiple shared mappings of the same file
in the same MM, we need to ensure that we have coherency across all
copies.  We do this via make_coherent() by making the pages
uncacheable.

This used to work fine, until we allowed highmem with highpte - we
now have a page table which is mapped as required, and is not available
for modification via update_mmu_cache().

Ralf Beache suggested getting rid of the PTE value passed to
update_mmu_cache():

  On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables
  to construct a pointer to the pte again.  Passing a pte_t * is much
  more elegant.  Maybe we might even replace the pte argument with the
  pte_t?

Ben Herrenschmidt would also like the pte pointer for PowerPC:

  Passing the ptep in there is exactly what I want.  I want that
  -instead- of the PTE value, because I have issue on some ppc cases,
  for I$/D$ coherency, where set_pte_at() may decide to mask out the
  _PAGE_EXEC.

So, pass in the mapped page table pointer into update_mmu_cache(), and
remove the PTE value, updating all implementations and call sites to
suit.

Includes a fix from Stephen Rothwell:

  sparc: fix fallout from update_mmu_cache API change

  Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
 		2010-02-20 16:41:46 +00:00
..
mach avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
Kbuild byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
addrspace.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
asm-offsets.h kbuild: move asm-offsets.h to include/generated 2009-12-12 13:08:14 +01:00
asm.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
atomic.h asm-generic: rename atomic.h to atomic-long.h 2009-06-11 21:02:17 +02:00
auxvec.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
bitops.h avr32: define __fls 2009-01-01 10:12:16 +10:30
bitsperlong.h asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
bug.h avr32: Convert BUG() to use unreachable() 2009-12-05 09:10:12 -08:00
bugs.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
byteorder.h byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
cache.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
cachectl.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
cacheflush.h block: add helpers to run flush_dcache_page() against a bio and a request's pages 2009-11-26 09:16:19 +01:00
checksum.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
cputime.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
current.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
delay.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
device.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
div64.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
dma-mapping.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
dma.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
elf.h elf: kill USE_ELF_CORE_DUMP 2009-12-16 07:20:12 -08:00
emergency-restart.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
errno.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
fb.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
fcntl.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
ftrace.h tracing: make CALLER_ADDRx overwriteable 2009-03-02 16:49:37 -05:00
futex.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
gpio.h avr32: Use <mach/foo.h> instead of <asm/arch/foo.h> 2008-08-05 14:36:57 +02:00
hardirq.h avr32: convert to asm-generic/hardirq.h 2009-12-14 19:24:28 +01:00
hw_irq.h avr32: remove obsolete hw_interrupt_type 2009-05-13 16:53:48 +02:00
io.h avr32: Implement {read,write}[bwl]_be 2008-10-08 18:44:57 +02:00
ioctl.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
ioctls.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
ipcbuf.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
irq.h avr32: Use <mach/foo.h> instead of <asm/arch/foo.h> 2008-08-05 14:36:57 +02:00
irq_regs.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
irqflags.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
kdebug.h avr32: Define DIE_OOPS 2009-01-07 10:40:30 +01:00
kmap_types.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
kprobes.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
linkage.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
local.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
mman.h mm: remove duplicate asm/mman.h files 2009-09-22 07:17:42 -07:00
mmu.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
mmu_context.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
module.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
msgbuf.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
mutex.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
numnodes.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
ocd.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
page.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
param.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
pci.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
percpu.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
pgalloc.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
pgtable-2level.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
pgtable.h MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself 2010-02-20 16:41:46 +00:00
poll.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
posix_types.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
processor.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
ptrace.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
resource.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
scatterlist.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
sections.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
sembuf.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
serial.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
setup.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
shmbuf.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
shmparam.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
sigcontext.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
siginfo.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
signal.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
socket.h net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
sockios.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
stat.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
statfs.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
string.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
swab.h headers_check fix: avr32, swab.h 2009-02-01 11:01:23 +05:30
syscalls.h Unify sys_mmap* 2009-12-11 06:44:29 -05:00
sysreg.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
system.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
termbits.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
termios.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
thread_info.h KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6] 2009-09-02 21:29:19 +10:00
timex.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
tlb.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
tlbflush.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
topology.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
traps.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
types.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
uaccess.h avr32: fix out-of-range rjmp instruction on large kernels 2009-01-16 09:38:05 +01:00
ucontext.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
unaligned.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
unistd.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
user.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00
xor.h avr32: Move include/asm-avr32 to arch/avr32/include/asm 2008-08-05 13:35:07 +02:00