[RFC PATCH v2 0/4] try secondary hash before BUG in kernel_map_linear_page()

[Li Zhong <zhong@linux.vnet.ibm.com>]

Hi Michael, 

Here is the updated version,  could you please help to review it again? 

As you suggested, this version didn't copy the code, but splitted
the logic into a helper function, so both kernel_map_linear_page() and
__hash_page_huge() can use. 

Also patch #1 moves some unnecessary code out of the repeating loop, so the 
splitting is easier. Patch #3 removes the HPTE_V_BOLTED flag in 
kernel_map_linear_page(), it seems not needed based on my understanding. 

Changes are split into smaller ones, so each one did only one thing. 

Thanks, Zhong

Li Zhong (4):
  powerpc: Move the setting of rflags out of loop in __hash_page_huge
  powerpc: Split the code trying to insert hpte repeatedly as an helper
    function
  powerpc: Don't bolt the hpte in kernel_map_linear_page()
  powerpc: Try to insert the hptes repeatedly in
    kernel_map_linear_page()

 arch/powerpc/mm/hash_utils_64.c      |   45 +++++++++++++++++++++++++++++++---
 arch/powerpc/mm/hugetlbpage-hash64.c |   31 +++++------------------
 2 files changed, 47 insertions(+), 29 deletions(-)

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1.7.9.5