[PATCH 3/3] common/spinlock: Drop inline from _spin_lock_cb()

[Andrew Cooper <andrew.cooper3@citrix.com>]

This is undefined behaviour, because there is no _spin_lock_cb() in a separate
translation unit (C11 6.7.4.11).

Moreover, MISRA prohibits this construct because, in the case where it is well
defined, the compiler is free to use either implementation and nothing
prevents the two from being different.

This function has external users, so drop the inline.

Spotted by Eclair MISRA scanner.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien@xen.org>
CC: Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
CC: Bertrand Marquis <bertrand.marquis@arm.com>
---
 xen/common/spinlock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/common/spinlock.c b/xen/common/spinlock.c
index 62c83aaa6a73..8cb3b316c5b1 100644
--- a/xen/common/spinlock.c
+++ b/xen/common/spinlock.c
@@ -159,7 +159,7 @@ static always_inline u16 observe_head(spinlock_tickets_t *t)
     return read_atomic(&t->head);
 }
 
-void inline _spin_lock_cb(spinlock_t *lock, void (*cb)(void *), void *data)
+void _spin_lock_cb(spinlock_t *lock, void (*cb)(void *), void *data)
 {
     spinlock_tickets_t tickets = SPINLOCK_TICKET_INC;
     LOCK_PROFILE_VAR;
-- 
2.11.0