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linux/arch/powerpc/include
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Reza Arbab 865a9432d1 powerpc/mm: Add _PAGE_SAO to _PAGE_CACHE_CTL mask 
In htab_convert_pte_flags(), _PAGE_CACHE_CTL is used to check for the
_PAGE_SAO flag:

  else if ((pteflags & _PAGE_CACHE_CTL) == _PAGE_SAO)
          rflags |= (HPTE_R_W | HPTE_R_I | HPTE_R_M);

But, it isn't defined to include that flag:

  #define _PAGE_CACHE_CTL (_PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT)

This happens to work, but only because of the flag values:

  #define _PAGE_SAO               0x00010 /* Strong access order */
  #define _PAGE_NON_IDEMPOTENT    0x00020 /* non idempotent memory */
  #define _PAGE_TOLERANT          0x00030 /* tolerant memory, cache inhibited */

To prevent any issues if these particulars ever change, add _PAGE_SAO to
the mask.

Suggested-by: Charles Johns <crjohns@us.ibm.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-31 00:36:06 +11:00
..
asm powerpc/mm: Add _PAGE_SAO to _PAGE_CACHE_CTL mask 2019-01-31 00:36:06 +11:00
uapi/asm arch: remove redundant UAPI generic-y defines 2019-01-06 10:22:15 +09:00