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| author | Michael Ellerman | 2012-02-20 22:32:30 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2012-02-22 06:48:49 +0100 |
| commit | 922b9f86a020258d3ea3bfed27251efaed7a03a3 (patch) | |
| tree | 5cdb92aed142e9d96c0e38352cbc0d6cb2dd581f /Documentation/pi-futex.txt | |
| parent | powerpc: Remove references to cpu_*_map (diff) | |
| download | kernel-qcow2-linux-922b9f86a020258d3ea3bfed27251efaed7a03a3.tar.gz kernel-qcow2-linux-922b9f86a020258d3ea3bfed27251efaed7a03a3.tar.xz kernel-qcow2-linux-922b9f86a020258d3ea3bfed27251efaed7a03a3.zip | |
powerpc: Fix program check handling when lockdep is enabled
In commit 54321242afe ("Disable interrupts early in Program Check"), we
switched from enabling to disabling interrupts in program_check_common.
Whereas ENABLE_INTS leaves r3 untouched, if lockdep is enabled DISABLE_INTS
calls into lockdep code and will clobber r3. That means we pass a bogus
struct pt_regs* into program_check_exception() and all hell breaks loose.
So load our regs pointer into r3 after we call DISABLE_INTS.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'Documentation/pi-futex.txt')
0 files changed, 0 insertions, 0 deletions