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[ Upstream commitfd749fe4bc] When CONFIG_EPOLL is not set/enabled, sys_oabi-compat.c has build errors. Fix these by surrounding them with ifdef CONFIG_EPOLL/endif and providing stubs for the "EPOLL is not set" case. ../arch/arm/kernel/sys_oabi-compat.c: In function 'sys_oabi_epoll_ctl': ../arch/arm/kernel/sys_oabi-compat.c:257:6: error: implicit declaration of function 'ep_op_has_event' [-Werror=implicit-function-declaration] 257 | if (ep_op_has_event(op) && | ^~~~~~~~~~~~~~~ ../arch/arm/kernel/sys_oabi-compat.c:264:9: error: implicit declaration of function 'do_epoll_ctl'; did you mean 'sys_epoll_ctl'? [-Werror=implicit-function-declaration] 264 | return do_epoll_ctl(epfd, op, fd, &kernel, false); | ^~~~~~~~~~~~ Fixes:c281634c86("ARM: compat: remove KERNEL_DS usage in sys_oabi_epoll_ctl()") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kernel test robot <lkp@intel.com> # from an lkp .config file Cc: linux-arm-kernel@lists.infradead.org Cc: Nicolas Pitre <nico@fluxnic.net> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: patches@armlinux.org.uk Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> 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.