diff options
| author | Alastair D'Silva <alastair@d-silva.org> | 2019-08-21 10:19:27 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-29 08:28:59 +0200 |
| commit | 32df8a30b73474403a09b6cc686bc409652a2919 (patch) | |
| tree | 6cea2b48f5e389181f685c832a2dbd97d20a6bfb /include | |
| parent | 0d5e34c1e2633e6256826b8ae2f7fe0d6b3b45d1 (diff) | |
powerpc: Allow flush_(inval_)dcache_range to work across ranges >4GB
The upstream commit:
22e9c88d486a ("powerpc/64: reuse PPC32 static inline flush_dcache_range()")
has a similar effect, but since it is a rewrite of the assembler to C, is
too invasive for stable. This patch is a minimal fix to address the issue in
assembler.
This patch applies cleanly to v5.2, v4.19 & v4.14.
When calling flush_(inval_)dcache_range with a size >4GB, we were masking
off the upper 32 bits, so we would incorrectly flush a range smaller
than intended.
This patch replaces the 32 bit shifts with 64 bit ones, so that
the full size is accounted for.
Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions