[PATCH 2/4] tracing/histogram: Update division by 0 documentation
From: Kalesh Singh <hidden>
Date: 2021-10-29 18:34:14
Also in:
linux-kselftest, lkml
Subsystem:
documentation, the rest, tracing · Maintainers:
Jonathan Corbet, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
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 <redacted> --- 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::
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2.33.1.1089.g2158813163f-goog