[Patch v2 0/2] mm_slot: fix the usage of mm_slot_entry

[Wei Yang <richard.weiyang@gmail.com>]

The usage of mm_slot_entry() in ksm/khugepaged is not correct. In case
mm_slot_lookup() return a NULL slot, mm_slot_entry() should not be called.

To fix this:

Patch 1: check slot before continue in ksm.c
Patch 2: remove the definition of khugepaged_mm_slot

v2: 
  fix the error in code instead guard by compiler

V1:
  add a BUILD_BUG_ON_MSG() to make sure slot is the first element

[1]: https://lkml.kernel.org/r/20250914000026.17986-1-richard.weiyang@gmail.com

Wei Yang (2):
  mm/ksm: get mm_slot by mm_slot_entry() when slot is !NULL
  mm/khugepaged: remove definition of struct khugepaged_mm_slot

 mm/khugepaged.c | 57 ++++++++++++++++++-------------------------------
 mm/ksm.c        | 20 +++++++++--------
 2 files changed, 32 insertions(+), 45 deletions(-)

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2.34.1