Document the fact that passing in a count of zero to the bus_space functions

will result in undefined behaviour. Taken from NetBSD's bus_space(9).
2010-12-03 18:30:55 +00:00 · 2010-12-03 18:30:55 +00:00 · 01688065e7
commit 01688065e7
parent e2326639c2
1 changed files with 3 additions and 0 deletions
--- a/share/man/man9/bus_space.9
+++ b/share/man/man9/bus_space.9
@ -719,6 +719,9 @@ or which return data read from bus space (i.e., functions which
 do not obviously return an error code) do not fail.
 They could only fail
 if given invalid arguments, and in that case their behaviour is undefined.
+Functions which take a count of bytes have undefined results if the specified
+.Fa count
+is zero.
 .Sh TYPES
 Several types are defined in
 .In machine/bus.h