diff options
| author | David Hildenbrand <[email protected]> | 2022-12-23 15:56:16 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-01-19 01:12:50 +0000 |
| commit | 1ef488edd6c4d447784710974f049628c2890481 (patch) | |
| tree | a3577746e57294945403990ca3dd33a9a0986ee4 /fs/jbd2/commit.c | |
| parent | mm/userfaultfd: rely on vma->vm_page_prot in uffd_wp_range() (diff) | |
| download | kernel-1ef488edd6c4d447784710974f049628c2890481.tar.gz kernel-1ef488edd6c4d447784710974f049628c2890481.zip | |
mm/mprotect: drop pgprot_t parameter from change_protection()
Being able to provide a custom protection opens the door for
inconsistencies and BUGs: for example, accidentally allowing for more
permissions than desired by other mechanisms (e.g., softdirty tracking).
vma->vm_page_prot should be the single source of truth.
Only PROT_NUMA is special: there is no way we can erroneously allow
for more permissions when removing all permissions. Special-case using
the MM_CP_PROT_NUMA flag.
[[email protected]: PAGE_NONE might not be defined without CONFIG_NUMA_BALANCING]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: David Hildenbrand <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Nadav Amit <[email protected]>
Cc: Peter Xu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'fs/jbd2/commit.c')
0 files changed, 0 insertions, 0 deletions