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[ Upstream commita00a29b0ee] The compiler thinks "conn" might be NULL after a call to hci_bind_bis(), which cannot happen. Avoid any confusion by just making it not return a value since it cannot fail. Fixes the warnings seen with GCC 13: In function 'arch_atomic_dec_and_test', inlined from 'atomic_dec_and_test' at ../include/linux/atomic/atomic-instrumented.h:576:9, inlined from 'hci_conn_drop' at ../include/net/bluetooth/hci_core.h:1391:6, inlined from 'hci_connect_bis' at ../net/bluetooth/hci_conn.c:2124:3: ../arch/x86/include/asm/rmwcc.h:37:9: warning: array subscript 0 is outside array bounds of 'atomic_t[0]' [-Warray-bounds=] 37 | asm volatile (fullop CC_SET(cc) \ | ^~~ ... In function 'hci_connect_bis': cc1: note: source object is likely at address zero Fixes:eca0ae4aea("Bluetooth: Add initial implementation of BIS connections") Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: linux-bluetooth@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.