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Everywhere: Switch from (void) to [[maybe_unused]] (#4473)

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Problem:
- `(void)` simply casts the expression to void. This is understood to
  indicate that it is ignored, but this is really a compiler trick to
  get the compiler to not generate a warning.

Solution:
- Use the `[[maybe_unused]]` attribute to indicate the value is unused.

Note:
- Functions taking a `(void)` argument list have also been changed to
  `()` because this is not needed and shows up in the same grep
  command.
This commit is contained in:
Lenny Maiorani 2020-12-20 16:09:48 -07:00 • committed by GitHub
parent 4421d98e30
commit 765936ebae
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GPG key ID: 4AEE18F83AFDEB23
103 changed files with 219 additions and 362 deletions
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5
Kernel/Net/IPv4Socket.cpp
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@ -203,11 +203,10 @@ int IPv4Socket::allocate_local_port_if_needed()
return port;
}
KResultOr<size_t> IPv4Socket::sendto(FileDescription&, const UserOrKernelBuffer& data, size_t data_length, int flags, Userspace<const sockaddr*> addr, socklen_t addr_length)
KResultOr<size_t> IPv4Socket::sendto(FileDescription&, const UserOrKernelBuffer& data, size_t data_length, [[maybe_unused]] int flags, Userspace<const sockaddr*> addr, socklen_t addr_length)
{
LOCKER(lock());
(void)flags;
if (addr && addr_length != sizeof(sockaddr_in))
return KResult(-EINVAL);
@ -621,7 +620,7 @@ int IPv4Socket::ioctl(FileDescription&, unsigned request, FlatPtr arg)
KResult IPv4Socket::close()
{
(void)shutdown(SHUT_RDWR);
[[maybe_unused]] auto rc = shutdown(SHUT_RDWR);
return KSuccess;
}