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arm64/sve: Minor clarification of ABI documentation

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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>
This commit is contained in:
Mark Brown 2021-12-10 18:40:59 +00:00 committed by Catalin Marinas
parent 30c43e73b3
commit aed34d9e52
1 changed files with 1 additions and 1 deletions
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Documentation/arm64/sve.rst
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@ -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: