1. 12 2月, 2016 1 次提交
  2. 16 1月, 2016 1 次提交
    • D
      mm, dax, pmem: introduce pfn_t · 34c0fd54
      Dan Williams 提交于
      For the purpose of communicating the optional presence of a 'struct
      page' for the pfn returned from ->direct_access(), introduce a type that
      encapsulates a page-frame-number plus flags.  These flags contain the
      historical "page_link" encoding for a scatterlist entry, but can also
      denote "device memory".  Where "device memory" is a set of pfns that are
      not part of the kernel's linear mapping by default, but are accessed via
      the same memory controller as ram.
      
      The motivation for this new type is large capacity persistent memory
      that needs struct page entries in the 'memmap' to support 3rd party DMA
      (i.e.  O_DIRECT I/O with a persistent memory source/target).  However,
      we also need it in support of maintaining a list of mapped inodes which
      need to be unmapped at driver teardown or freeze_bdev() time.
      Signed-off-by: NDan Williams <dan.j.williams@intel.com>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Dave Hansen <dave@sr71.net>
      Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      34c0fd54
  3. 15 1月, 2016 1 次提交
  4. 14 9月, 2008 1 次提交
  5. 28 3月, 2006 1 次提交
    • D
      [PATCH] unify PFN_* macros · 22a9835c
      Dave Hansen 提交于
      Just about every architecture defines some macros to do operations on pfns.
       They're all virtually identical.  This patch consolidates all of them.
      
      One minor glitch is that at least i386 uses them in a very skeletal header
      file.  To keep away from #include dependency hell, I stuck the new
      definitions in a new, isolated header.
      
      Of all of the implementations, sh64 is the only one that varied by a bit.
      It used some masks to ensure that any sign-extension got ripped away before
      the arithmetic is done.  This has been posted to that sh64 maintainers and
      the development list.
      
      Compiles on x86, x86_64, ia64 and ppc64.
      Signed-off-by: NDave Hansen <haveblue@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      22a9835c