• Ira Weiny's avatar
    arch/kmap: remove BUG_ON() · 01c4b788
    Ira Weiny authored
    Patch series "Remove duplicated kmap code", v3.
    
    The kmap infrastructure has been copied almost verbatim to every
    architecture.  This series consolidates obvious duplicated code by
    defining core functions which call into the architectures only when
    needed.
    
    Some of the k[un]map_atomic() implementations have some similarities but
    the similarities were not sufficient to warrant further changes.
    
    In addition we remove a duplicate implementation of kmap() in DRM.
    
    This patch (of 15):
    
    Replace the use of BUG_ON(in_interrupt()) in the kmap() and kunmap() in
    favor of might_sleep().
    
    Besides the benefits of might_sleep(), this normalizes the implementations
    such that they can be made generic in subsequent patches.
    Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Reviewed-by: default avatarDan Williams <dan.j.williams@intel.com>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    Cc: Al Viro <viro@zeniv.linux.org.uk>
    Cc: Christian König <christian.koenig@amd.com>
    Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
    Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
    Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
    Cc: Helge Deller <deller@gmx.de>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Chris Zankel <chris@zankel.net>
    Cc: Max Filippov <jcmvbkbc@gmail.com>
    Link: http://lkml.kernel.org/r/20200507150004.1423069-1-ira.weiny@intel.com
    Link: http://lkml.kernel.org/r/20200507150004.1423069-2-ira.weiny@intel.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    01c4b788
highmem.c 4.04 KB