aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64
diff options
context:
space:
mode:
authorYinghai Lu <yinghai@kernel.org>2009-05-06 21:36:16 -0700
committerIngo Molnar <mingo@elte.hu>2009-05-11 11:40:43 +0200
commit917a0153621572e88aeb2d5df025ad2e81027287 (patch)
tree4a1f06f9820f10d714814a9fa86f2094e8eb9c4a /arch/ia64
parentb74d446f1f337e3fe906169a3266cb65ffa4179e (diff)
x86: mtrr: Fix high_width computation when phys-addr is >= 44bit
found one system where cpu address line is 44bits, mtrr printout is not right: [ 0.000000] MTRR variable ranges enabled: [ 0.000000] 0 base 0 00000000 mask FF0 00000000 write-back [ 0.000000] 1 base 10 00000000 mask FFF 80000000 write-back [ 0.000000] 2 base 0 80000000 mask FFF 80000000 uncachable [ 0.000000] 3 base 0 7F800000 mask FFF FF800000 uncachable Li Zefan and Frederic pointed out the high_width could be -4 some how. It turns out when phys_addr is 44bit, size_or_mask will be ffffffff,00000000 so ffs(size_or_mask) will be 0. Try to check low 32 bit, to get correct high_width. Signed-off-by: Yinghai Lu <yinghai@kerne.org> Also-analyzed-by: Frederic Weisbecker <fweisbec@gmail.com> Also-analyzed-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Zhaolei <zhaolei@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A026540.8060504@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/ia64')
0 files changed, 0 insertions, 0 deletions