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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
..
Kbuild score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
asm-offsets.h score: add asm/asm-offsets.h wrapper 2009-12-12 13:08:16 +01:00
asmmacro.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
atomic.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
auxvec.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
bitops.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
bitsperlong.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
bug.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
bugs.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
byteorder.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
cache.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
cacheflush.h score: add flush_dcahce_page and PG_dcache_dirty define 2009-12-17 18:28:31 +08:00
checksum.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
cputime.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
current.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
delay.h score: include asm-generic/param.h in asm/delay.h. 2009-12-17 18:31:23 +08:00
device.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
div64.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
dma-mapping.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
dma.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
elf.h elf: kill USE_ELF_CORE_DUMP 2009-12-16 07:20:12 -08:00
emergency-restart.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
errno.h score: update files according to review comments 2009-06-19 11:40:13 +02:00
fcntl.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
fixmap.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
ftrace.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
futex.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
hardirq.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
hw_irq.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
io.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
ioctl.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
ioctls.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
ipcbuf.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
irq.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
irq_regs.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
irqflags.h score: remove unused code, add include files in .c 2009-08-30 12:26:32 +08:00
kdebug.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
kmap_types.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
linkage.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
local.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
mman.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
mmu.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
mmu_context.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
module.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
msgbuf.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
mutex.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
page.h score: fixed pfn_valid define. 2009-12-17 18:28:31 +08:00
param.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
pci.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
percpu.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
pgalloc.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
pgtable-bits.h score: update files according to review comments 2009-06-19 11:40:13 +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 score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
posix_types.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
processor.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
ptrace.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
resource.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
scatterlist.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
scoreregs.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
sections.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
segment.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
sembuf.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
setup.h score: add MEMORY_START and MEMORY_SIZE define, to make the code clear 2009-08-30 12:31:58 +08:00
shmbuf.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
shmparam.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
sigcontext.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
siginfo.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
signal.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
socket.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
sockios.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
stat.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
statfs.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
string.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
swab.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
syscalls.h score: add prototypes for wrapped syscalls 2009-06-19 14:10:46 +02:00
system.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
termbits.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
termios.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
thread_info.h score: Make THREAD_SIZE available to assembly files. 2009-09-23 13:37:42 +08:00
timex.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
tlb.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
tlbflush.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
topology.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
types.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
uaccess.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00
ucontext.h score: add missing #includes 2009-06-27 15:09:46 +02:00
unaligned.h score: Add support for Sunplus S+core architecture 2009-06-19 11:38:47 +02:00
unistd.h score: add old syscall support 2009-08-30 12:33:30 +08:00
user.h score: update inconsistent declare after .c was changed 2009-08-30 12:30:16 +08:00