head -r352274 buildkernel targetting armv7 failure: am335x/am335x_dmtpps.c:304:3: error: implicit declaration of function 'spinlock_enter' is invalid in C99 [-Werror,-Wimplicit-function-declaration]

After updating my amd64 context to head -r352274,
attempting an amd64->armv7 cross buildworld buildkernel
ended up failing with:


--- am335x_dmtpps.o ---
/usr/src/sys/arm/ti/am335x/am335x_dmtpps.c:304:3: error: implicit declaration of function 'spinlock_enter' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                mtx_lock_spin(&sc->pps_mtx);
                ^
/usr/src/sys/sys/mutex.h:383:26: note: expanded from macro 'mtx_lock_spin'
#define mtx_lock_spin(m)        mtx_lock_spin_flags((m), 0)
                                ^
/usr/src/sys/sys/mutex.h:452:2: note: expanded from macro 'mtx_lock_spin_flags'
        mtx_lock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE)
        ^
/usr/src/sys/sys/mutex.h:429:2: note: expanded from macro 'mtx_lock_spin_flags_'
        __mtx_lock_spin((m), curthread, (opts), (file), (line))
        ^
/usr/src/sys/sys/mutex.h:258:2: note: expanded from macro '__mtx_lock_spin'
        spinlock_enter();                                               \
        ^
/usr/src/sys/arm/ti/am335x/am335x_dmtpps.c:304:3: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
/usr/src/sys/sys/mutex.h:383:26: note: expanded from macro 'mtx_lock_spin'
#define mtx_lock_spin(m)        mtx_lock_spin_flags((m), 0)
                                ^
/usr/src/sys/sys/mutex.h:452:2: note: expanded from macro 'mtx_lock_spin_flags'
        mtx_lock_spin_flags_((m), (opts), LOCK_FILE, LOCK_LINE)
        ^
/usr/src/sys/sys/mutex.h:429:2: note: expanded from macro 'mtx_lock_spin_flags_'
        __mtx_lock_spin((m), curthread, (opts), (file), (line))
        ^
/usr/src/sys/sys/mutex.h:258:2: note: expanded from macro '__mtx_lock_spin'
        spinlock_enter();                                               \
        ^
. . .

(spinlock_enter was not the only example.)

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)