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| 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 08:30:27 +0200 |
| commit | 3981720f800f729e2ab13a68102f082cdc98bf0a (patch) | |
| tree | 36904999f5903750715341a31c5a4375604b275e /net | |
| parent | 28ad328e672bc799452e8481ef35fa58654f682f (diff) | |
| download | linux-stable-3981720f800f729e2ab13a68102f082cdc98bf0a.tar.gz linux-stable-3981720f800f729e2ab13a68102f082cdc98bf0a.tar.bz2 linux-stable-3981720f800f729e2ab13a68102f082cdc98bf0a.zip | |
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 'net')
0 files changed, 0 insertions, 0 deletions