• Christoph Hellwig's avatar
    mm: add a vmap_pfn function · 3e9a9e25
    Christoph Hellwig authored
    
    
    Add a proper helper to remap PFNs into kernel virtual space so that
    drivers don't have to abuse alloc_vm_area and open coded PTE manipulation
    for it.
    
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
    Cc: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: Jani Nikula <jani.nikula@linux.intel.com>
    Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: Matthew Auld <matthew.auld@intel.com>
    Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
    Cc: Minchan Kim <minchan@kernel.org>
    Cc: Nitin Gupta <ngupta@vflare.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
    Cc: Stefano Stabellini <sstabellini@kernel.org>
    Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
    Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
    Link: https://lkml.kernel.org/r/20201002122204.1534411-4-hch@lst.de
    
    
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    3e9a9e25