Commit aed34d9e authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

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: default avatarLuis Machado <Luis.Machado@arm.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210184133.320748-4-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 30c43e73

Documentation/arm64/sve.rst

+1 −1
Original line number Diff line number Diff line
@@ -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: