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| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2023-12-13 21:29:59 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-12-20 10:48:13 -0800 |
| commit | eba2591d99d1f14a04c8a8a845ab0795b93f5646 (patch) | |
| tree | 3cf33861700ea727208efc0a175d181fe10df5f4 /arch/riscv/mm/pgtable.c | |
| parent | c30fa83b49897e708a52e122dd10616a52a4c82b (diff) | |
mm: Introduce pudp/p4dp/pgdp_get() functions
Instead of directly dereferencing page tables entries, which can cause
issues (see commit 20a004e7b017 ("arm64: mm: Use READ_ONCE/WRITE_ONCE when
accessing page tables"), let's introduce new functions to get the
pud/p4d/pgd entries (the pte and pmd versions already exist).
Note that arm pgd_t is actually an array so pgdp_get() is defined as a
macro to avoid a build error.
Those new functions will be used in subsequent commits by the riscv
architecture.
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20231213203001.179237-3-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/mm/pgtable.c')
0 files changed, 0 insertions, 0 deletions