• Christoph Hellwig's avatar
    dma-mapping: consolidate dma_{alloc,free}_noncoherent · 1e893752
    Christoph Hellwig authored
    Most architectures do not support non-coherent allocations and either
    define dma_{alloc,free}_noncoherent to their coherent versions or stub
    them out.
    
    Openrisc uses dma_{alloc,free}_attrs to implement them, and only Mips
    implements them directly.
    
    This patch moves the Openrisc version to common code, and handles the
    DMA_ATTR_NON_CONSISTENT case in the mips dma_map_ops instance.
    
    Note that actual non-coherent allocations require a dma_cache_sync
    implementation, so if non-coherent allocations didn't work on
    an architecture before this patch they still won't work after it.
    
    [jcmvbkbc@gmail.com: fix xtensa]
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Russell King <linux@arm.linux.org.uk>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
    Cc: Michal Simek <monstr@monstr.eu>
    Cc: Jonas Bonn <jonas@southpole.se>
    Cc: Chris Metcalf <cmetcalf@ezchip.com>
    Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
    Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    1e893752
dma-mapping.h 1.32 KB