powerpc: Only make kernel text pages of linear mapping executable
authorPaul Mackerras <paulus@samba.org>
Sat, 30 Aug 2008 01:26:27 +0000 (11:26 +1000)
committerPaul Mackerras <paulus@samba.org>
Wed, 3 Sep 2008 10:53:22 +0000 (20:53 +1000)
commit9e88ba4e45ecad2425c4cc4e0861a26f4e36c6da
treebcd48acbd2420eda4d9018d3c0c697cdb84c44f6
parent78fbc824ed8225edd80cdc57771d5ca4f7aae95e
powerpc: Only make kernel text pages of linear mapping executable

Commit bc033b63bbfeb6c4b4eb0a1d083c650e4a0d2af8 ("powerpc/mm: Fix
attribute confusion with htab_bolt_mapping()") moved the check for
whether we should make pages of the linear mapping executable from
htab_bolt_mapping into its callers, including htab_initialize.
A side-effect of this is that the decision is now made once for
each contiguous section in the LMB array rather than for each page
individually.  This can often mean that the whole of the linear
mapping ends up being executable.

This reverts to the previous behaviour, where individual pages are
checked for being part of the kernel text or not, by moving the check
back down into htab_bolt_mapping.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/mm/hash_utils_64.c