Commit Graph

10 Commits

Author SHA1 Message Date
Russell King 303c644365 [ARM] clearpage: provide our own clear_user_highpage()
For similar reasons as copy_user_page(), we want to avoid the
additional kmap_atomic if it's unnecessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 23:53:48 +00:00
Russell King 063b0a4207 [ARM] copypage: provide our own copy_user_highpage()
We used to override the copy_user_page() function.  However, this
is not only inefficient, it also causes additional complexity for
highmem support, since we convert from a struct page to a kernel
direct mapped address and back to a struct page again.

Moreover, with highmem support, we end up pointlessly setting up
kmap entries for pages which we're going to remap.  So, push the
kmapping down into the copypage implementation files where it's
required.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-27 23:53:47 +00:00
Russell King 46097c7dd8 [ARM] cachetype: move definitions to separate header
Rather than pollute asm/cacheflush.h with the cache type definitions,
move them to asm/cachetype.h, and include this new header where
necessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:24 +01:00
Richard Purdie 1c9d3df5e8 [ARM] 4078/1: Fix ARM copypage cache coherency problems
If PG_dcache_dirty is set for a page, we need to flush the source page
before performing any copypage operation using a different virtual address.

This fixes the copypage implementations for XScale, StrongARM and ARMv6.

This patch fixes segmentation faults seen in the dynamic linker under
the usage patterns in glibc 2.4/2.5.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-30 17:05:08 +00:00
Russell King ad1ae2fe7f [ARM] Unuse another Linux PTE bit
L_PTE_ASID is not really required to be stored in every PTE, since we
can identify it via the address passed to set_pte_at().  So, create
set_pte_ext() which takes the address of the PTE to set, the Linux
PTE value, and the additional CPU PTE bits which aren't encoded in
the Linux PTE value.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-13 14:34:43 +00:00
Russell King 1b2e2b73b4 [ARM] Cleanup arch/arm/mm a little
Move top_pmd into arch/arm/mm/mm.h - nothing outside arch/arm/mm
references it.

Move the repeated definition of TOP_PTE into mm/mm.h, as well as
a few function prototypes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-09-20 14:58:35 +01:00
Russell King b4c2803ca8 [ARM] Make v6 copypage function static and cleanup pgprots
We know what pgprot we're going to use, so don't #define it.  Also,
since we select the nonaliasing/aliasing copypage implementation at
run time, there's no point having it globally visible.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-10-30 19:03:21 +00:00
Russell King b8a9b66fbe [PATCH] ARM: Add common CACHE_COLOUR macro
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-06-20 11:31:09 +01:00
Russell King 08ee4e4c5f [PATCH] ARM: Use top_pmd for V6 copy/clear user_page
Remove needless page table walking for v6 page operations.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
2005-05-10 17:30:47 +01:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00