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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-06-08 10:58:58 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-07-14 14:13:51 +1000
commitff82c319e6327b12cd94c5c57754abff243ab3e4 (patch)
tree9545c320549d37f6f9bf99b6ea3eacd6e549706a /arch/x86/video
parent34d97e07cc81ab6f1e63696127cc7a5d2c4fce4b (diff)
downloadop-kernel-dev-ff82c319e6327b12cd94c5c57754abff243ab3e4.zip
op-kernel-dev-ff82c319e6327b12cd94c5c57754abff243ab3e4.tar.gz
powerpc/book3e: Fix single step when using HW page tables
We patch the TLB miss exception vectors to point to alternate functions when using HW page table on BookE. However, we were patching in a new branch in the first instruction of the exception handler instead of the second one, thus overriding the nop that is in the first instruction. This cause problems when single stepping as we rely on that nop for the single step to stop properly within the exception vector range rather than on the target of the branch. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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