[PATCH v5 0/4] Fix issues with huge mapping in ioremap for ARM64

[Chintan Pandya]

This series of patches are follow up work (and depends on)
Toshi Kani <toshi.kani at hpe.com>'s patches "fix memory leak/
panic in ioremap huge pages".

This series of patches are tested on 4.9 kernel with Cortex-A75
based SoC.

These patches can also go into '-stable' branch.

Chintan Pandya (4):
  ioremap: Update pgtable free interfaces with addr
  arm64: tlbflush: Introduce __flush_tlb_kernel_pgtable
  arm64: Implement page table free interfaces
  Revert "arm64: Enforce BBM for huge IO/VMAP mappings"

>From V4->V5:
 - Add new API __flush_tlb_kernel_pgtable(unsigned long addr)
   for kernel addresses

>From V3->V4:
 - Add header for 'addr' in x86 implementation
 - Re-order pmd/pud clear and table free
 - Avoid redundant TLB invalidatation in one perticular case

>From V2->V3:
 - Use the exisiting page table free interface to do arm64
   specific things

>From V1->V2:
 - Rebased my patches on top of "[PATCH v2 1/2] mm/vmalloc:
   Add interfaces to free unmapped page table"
 - Honored BBM for ARM64


 arch/arm64/include/asm/tlbflush.h |  6 ++++++
 arch/arm64/mm/mmu.c               | 45 ++++++++++++++++++++++++++++-----------
 arch/x86/mm/pgtable.c             |  6 ++++--
 include/asm-generic/pgtable.h     |  8 +++----
 lib/ioremap.c                     |  4 ++--
 5 files changed, 49 insertions(+), 20 deletions(-)

-- 
Qualcomm India Private Limited, on behalf of Qualcomm Innovation
Center, Inc., is a member of Code Aurora Forum, a Linux Foundation
Collaborative Project