From 96f5aabaccdbbf31ff29b20928b1e18be304fee0 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 10 Dec 2021 18:40:59 +0000 Subject: [PATCH] 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 Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20211210184133.320748-4-broonie@kernel.org Signed-off-by: Catalin Marinas --- Documentation/arm64/sve.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/arm64/sve.rst b/Documentation/arm64/sve.rst index 03137154299e5..9d9a4de5bc34a 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: -- 2.39.5