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| author | Mark Brown <broonie@kernel.org> | 2021-12-10 18:40:59 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 18:33:44 +0000 |
| commit | aed34d9e52b80b4e7485119272c77c5553a21499 (patch) | |
| tree | 875f784a9a0adb2da8fb791959454dd570fb0aa4 /Documentation/arm64 | |
| parent | 30c43e73b3fa2d75f5d4e72fea345380ba5eb21b (diff) | |
| download | linux-stable-aed34d9e52b80b4e7485119272c77c5553a21499.tar.gz linux-stable-aed34d9e52b80b4e7485119272c77c5553a21499.tar.bz2 linux-stable-aed34d9e52b80b4e7485119272c77c5553a21499.zip | |
arm64/sve: Minor clarification of ABI documentation
As suggested by Luis for the SME version of this explicitly say that the
vector length should be extracted from the return value of a set vector
length prctl() with a bitwise and rather than just any old and.
Suggested-by: Luis Machado <Luis.Machado@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210184133.320748-4-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
| -rw-r--r-- | Documentation/arm64/sve.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/arm64/sve.rst b/Documentation/arm64/sve.rst index 03137154299e..9d9a4de5bc34 100644 --- a/Documentation/arm64/sve.rst +++ b/Documentation/arm64/sve.rst @@ -255,7 +255,7 @@ prctl(PR_SVE_GET_VL) vector length change (which would only normally be the case between a fork() or vfork() and the corresponding execve() in typical use). - To extract the vector length from the result, and it with + To extract the vector length from the result, bitwise and it with PR_SVE_VL_LEN_MASK. Return value: a nonnegative value on success, or a negative value on error: |