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| author | Palmer Dabbelt <palmer@rivosinc.com> | 2024-05-16 23:00:00 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-05-23 02:12:47 +0300 |
| commit | 12cf29c6f900f04cd34e8867d4421aba49cd6a5d (patch) | |
| tree | bb772156df7d8afbb24e7e32f3ad56a82d6a5bf3 /include | |
| parent | 2aff5f955bbae311ca4b66e1dbd934e8f346d1f1 (diff) | |
| parent | ad5643cf2f699989daa85d909403febd6712fccb (diff) | |
| download | linux-12cf29c6f900f04cd34e8867d4421aba49cd6a5d.tar.xz | |
Merge patch series "riscv: access_ok() optimization"
Samuel Holland <samuel.holland@sifive.com> says:
This series optimizes access_ok() by defining TASK_SIZE_MAX. At Alex's
suggestion, I also tried making TASK_SIZE constant (specifically by
making PGDIR_SHIFT a variable instead of a ternary expression, then
replacing the load with an immediate using ALTERNATIVE). This appeared
to slightly improve performance on some implementations (C906) but
regressed it on others (FU740). So I am leaving further optimizations to
a later series.
* b4-shazam-merge:
riscv: Define TASK_SIZE_MAX for __access_ok()
riscv: Remove PGDIR_SIZE_L3 and TASK_SIZE_MIN
Link: https://lore.kernel.org/r/20240327143858.711792-1-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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