• John David Anglin's avatar
    parisc: Optimize flush_kernel_vmap_range and invalidate_kernel_vmap_range · 316ec062
    John David Anglin authored
    The previously submitted patch did not resolve the random segmentation
    faults observed on the phantom buildd system.  There are still
    unresolved problems with the Debian 4.8 and 4.9 kernels on C8000.
    
    The attached patch removes the flush of the offset map pages and does a
    whole data cache flush for large ranges.  No other arch flushes the
    offset map in these routines as far as I can tell.
    
    I have not observed any random segmentation faults on rp3440 in two
    weeks of testing with 4.10.0 and 4.10.1.
    Signed-off-by: default avatarJohn David Anglin <dave.anglin@bell.net>
    Cc: stable@vger.kernel.org      # v4.8+
    Signed-off-by: default avatarHelge Deller <deller@gmx.de>
    316ec062
cacheflush.h 3.96 KB