Messages in this thread Patch in this message | | | Date | Fri, 29 Oct 2021 11:33:28 -0700 | Subject | [PATCH 2/4] tracing/histogram: Update division by 0 documentation | From | Kalesh Singh <> |
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If the divisor is a constant and zero, the undeifned case can be detected and an error returned instead of -1.
Signed-off-by: Kalesh Singh <kaleshsingh@google.com> --- Documentation/trace/histogram.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst index 66ec972dfb78..859fd1b76c63 100644 --- a/Documentation/trace/histogram.rst +++ b/Documentation/trace/histogram.rst @@ -1766,7 +1766,8 @@ using the same key and variable from yet another event:: Expressions support the use of addition, subtraction, multiplication and division operators (+-\*/). -Note that division by zero always returns -1. +Note if division by zero cannot be detected at parse time (i.e. the +divisor is not a constant), the result will be -1. Numeric constants can also be used directly in an expression:: -- 2.33.1.1089.g2158813163f-goog
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