• Christoph Hellwig's avatar
    gpu/drm: remove the powerpc hack in drm_legacy_sg_alloc · d28ff991
    Christoph Hellwig authored
    The non-cached vmalloc mapping was initially added as a hack for the
    first-gen amigaone platform (6xx/book32s), isn't fully supported upstream,
    and which used the legacy radeon driver together with non-coherent DMA.
    However this only ever worked reliably for DRI .
    
    Remove the hack as it is the last user of __vmalloc passing a page
    protection flag other than PAGE_KERNEL and didn't do anything for other
    platforms with non-coherent DMA.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
    Cc: Christian Borntraeger <borntraeger@de.ibm.com>
    Cc: Christophe Leroy <christophe.leroy@c-s.fr>
    Cc: David Airlie <airlied@linux.ie>
    Cc: Gao Xiang <xiang@kernel.org>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Haiyang Zhang <haiyangz@microsoft.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: "K. Y. Srinivasan" <kys@microsoft.com>
    Cc: Laura Abbott <labbott@redhat.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Michael Kelley <mikelley@microsoft.com>
    Cc: Minchan Kim <minchan@kernel.org>
    Cc: Nitin Gupta <ngupta@vflare.org>
    Cc: Robin Murphy <robin.murphy@arm.com>
    Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
    Cc: Stephen Hemminger <sthemmin@microsoft.com>
    Cc: Sumit Semwal <sumit.semwal@linaro.org>
    Cc: Wei Liu <wei.liu@kernel.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Cc: Paul Mackerras <paulus@ozlabs.org>
    Cc: Vasily Gorbik <gor@linux.ibm.com>
    Cc: Will Deacon <will@kernel.org>
    Link: http://lkml.kernel.org/r/20200414131348.444715-21-hch@lst.deSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    d28ff991
drm_scatter.c 5.32 KB