diff options
| author | Catalin Marinas <[email protected]> | 2010-02-04 01:04:50 -0500 |
|---|---|---|
| committer | Jeff Garzik <[email protected]> | 2010-02-04 01:04:50 -0500 |
| commit | 2d68b7fe55d9e19a8a868224ed0dfd6526568521 (patch) | |
| tree | f18068b57359ddc0be3d5fba6f8eabc097efd1af /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py | |
| parent | cedc9bf906dae044443d403371c887affdb44168 (diff) | |
[libata] Call flush_dcache_page after PIO data transfers in libata-sff.c
flush_dcache_page() must be called after (!ATA_TFLAG_WRITE) the
data copying to avoid D-cache aliasing with user space or I-D cache
coherency issues (when reading data from an ATA device using PIO,
the kernel dirties the D-cache but there is no flush_dcache_page()
required on Harvard architectures).
Signed-off-by: Catalin Marinas <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py')
0 files changed, 0 insertions, 0 deletions