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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-07-16 19:36:57 +0000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-08-20 10:12:28 +1000 |
commit | c5a8c0c99f67ae8a784faafbaaea1529825796e2 (patch) | |
tree | 731b07d0ac0414dbeac5ce940fe59a04a8d63c3f /crypto | |
parent | ee43eb788b3a06425fffb912677e2e1c8b00dd3b (diff) |
powerpc: Remove use of a second scratch SPRG in STAB code
The STAB code used on Power3 and RS/64 uses a second scratch SPRG to
save a GPR in order to decide whether to go to do_stab_bolted_* or
to handle a normal data access exception.
This prevents our scheme of freeing SPRG3 which is user visible for
user uses since we cannot use SPRG0 which, on RS/64, seems to be
read-only for supervisor mode (like POWER4).
This reworks the STAB exception entry to use the PACA as temporary
storage instead.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions