diff options
| author | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-24 07:07:45 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-24 07:07:45 -0800 |
| commit | d7e76ce7b76e104936d0898080b1255a848ea0b1 (patch) | |
| tree | 3c4e85ccb46a235407c9af3d3b8424561f13cb37 /include | |
| parent | e2d6b54b935a98c7d83f7e27597738be903d6703 (diff) | |
| parent | 7df1ff5a5cd615815bc6fb4a3a981e9746935e59 (diff) | |
Merge patch series "riscv: Increase mmap_rnd_bits_max on Sv48/57"
Sami Tolvanen <samitolvanen@google.com> says:
We noticed that 64-bit RISC-V kernels limit mmap_rnd_bits to 24
even if the hardware supports a larger virtual address space size
[1]. These two patches allow mmap_rnd_bits_max to be changed during
init, and bumps up the maximum randomness if we end up setting up
4/5-level paging at boot.
* b4-shazam-merge:
riscv: mm: Update mmap_rnd_bits_max
mm: Change mmap_rnd_bits_max to __ro_after_init
Link: https://lore.kernel.org/r/20230929211155.3910949-4-samitolvanen@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index f5a97dec5169..2488c0c5a288 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -86,7 +86,7 @@ extern int sysctl_legacy_va_layout; #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS extern const int mmap_rnd_bits_min; -extern const int mmap_rnd_bits_max; +extern int mmap_rnd_bits_max __ro_after_init; extern int mmap_rnd_bits __read_mostly; #endif #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS |