* Why doesn't the GCC give any warning to these unused variables in the Linux kernel?
@ 2022-02-20 7:39 Song Zhi
2022-02-20 9:09 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Song Zhi @ 2022-02-20 7:39 UTC (permalink / raw)
To: kernelnewbies@kernelnewbies.org
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Normally, the compiler warns if a variable is declared but is never referenced. In the Linux kernel source code, some unused functions and variables are marked __atrribute__((unused)).
==> https://livegrep.com/search/linux?q=__attribute__((unused))
GCC, on the other hand, does not provide any warnings for these unused and unmarked variables like the integer flags in kernel/sched/idle.c#427<https://elixir.bootlin.com/linux/latest/source/kernel/sched/idle.c#L427> .
Why?
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2022-02-20 7:39 Why doesn't the GCC give any warning to these unused variables in the Linux kernel? Song Zhi
2022-02-20 9:09 ` Greg KH
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