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authorMark Rutland <mark.rutland@arm.com>2021-01-14 12:48:12 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2021-01-15 10:05:27 +0000
commitb6d8878d24e39f213df0f3ea7abebd15edc7be21 (patch)
tree6a2b1d6b9cf87e07c1e7d2e12d8863fc75f8c6e8
parentdca5244d2f5b94f1809f0c02a549edf41ccd5493 (diff)
downloadlinux-b6d8878d24e39f213df0f3ea7abebd15edc7be21.tar.bz2
arm64: syscall: include prototype for EL0 SVC functions
The kbuild test robot reports that when building with W=1, GCC will warn for a couple of missing prototypes in syscall.c: | arch/arm64/kernel/syscall.c:157:6: warning: no previous prototype for 'do_el0_svc' [-Wmissing-prototypes] | 157 | void do_el0_svc(struct pt_regs *regs) | | ^~~~~~~~~~ | arch/arm64/kernel/syscall.c:164:6: warning: no previous prototype for 'do_el0_svc_compat' [-Wmissing-prototypes] | 164 | void do_el0_svc_compat(struct pt_regs *regs) | | ^~~~~~~~~~~~~~~~~ While this isn't a functional problem, as a general policy we should include the prototype for functions wherever possible to catch any accidental divergence between the prototype and implementation. Here we can easily include <asm/exception.h>, so let's do so. While there are a number of warnings elsewhere and some warnings enabled under W=1 are of questionable benefit, this change helps to make the code more robust as it evolved and reduces the noise somewhat, so it seems worthwhile. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reported-by: kernel test robot <lkp@intel.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/202101141046.n8iPO3mw-lkp@intel.com Link: https://lore.kernel.org/r/20210114124812.17754-1-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
-rw-r--r--arch/arm64/kernel/syscall.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c
index 0bfac95fe464..c2877c332f2d 100644
--- a/arch/arm64/kernel/syscall.c
+++ b/arch/arm64/kernel/syscall.c
@@ -9,6 +9,7 @@
#include <asm/daifflags.h>
#include <asm/debug-monitors.h>
+#include <asm/exception.h>
#include <asm/fpsimd.h>
#include <asm/syscall.h>
#include <asm/thread_info.h>