]> git.baikalelectronics.ru Git - kernel.git/commit
powerpc/hw_brk: Fix off by one error when validating DAWR region end
authorMichael Neuling <mikey@neuling.org>
Mon, 1 Jul 2013 04:19:50 +0000 (14:19 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 1 Jul 2013 22:20:49 +0000 (08:20 +1000)
commitd513a7ecfeb085b1322f8fca2be6038f989bffd1
treebc7c89f204fbd0b2451fdb8d7b7fc5ca621add18
parent5885919e306911aceda1f023a76693168d919fb2
powerpc/hw_brk: Fix off by one error when validating DAWR region end

The Data Address Watchpoint Register (DAWR) on POWER8 can take a 512
byte range but this range must not cross a 512 byte boundary.

Unfortunately we were off by one when calculating the end of the region,
hence we were not allowing some breakpoint regions which were actually
valid.  This fixes this error.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Reported-by: Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 3.9+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/hw_breakpoint.c