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A lot of kvm specific functions are called only from assembler and have no extern prototype, but that causes a W=1 warnings: arch/arm64/kvm/handle_exit.c:365:24: error: no previous prototype for 'nvhe_hyp_panic_handler' [-Werror=missing-prototypes] arch/arm64/kvm/va_layout.c:188:6: error: no previous prototype for 'kvm_patch_vector_branch' [-Werror=mi ssing-prototypes] arch/arm64/kvm/va_layout.c:287:6: error: no previous prototype for 'kvm_get_kimage_voffset' [-Werror=mis sing-prototypes] arch/arm64/kvm/va_layout.c:293:6: error: no previous prototype for 'kvm_compute_final_ctr_el0' [-Werror= missing-prototypes] arch/arm64/kvm/hyp/vhe/switch.c:259:17: error: no previous prototype for 'hyp_panic' [-Werror=missing-pr arch/arm64/kvm/hyp/nvhe/switch.c:389:17: error: no previous prototype for 'kvm_unexpected_el2_exception' arch/arm64/kvm/hyp/nvhe/switch.c:384:28: error: no previous prototype for 'hyp_panic_bad_stack' [-Werror arch/arm64/kvm/hyp/nvhe/hyp-main.c:383:6: error: no previous prototype for 'handle_trap' [-Werror=missin arch/arm64/kvm/hyp/nvhe/psci-relay.c:203:28: error: no previous prototype for 'kvm_host_psci_cpu_entry' [-Werror=missing-prototypes] Declare those in asm/kvm_asm.h, which already has related declarations. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20230516160642.523862-7-arnd@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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.