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Subject[PATCH 2/4] tracing/histogram: Update division by 0 documentation
From
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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