seqlock: constify seqlock_read_begin

Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Emilio G. Cota 2018-08-18 00:25:12 -04:00 committed by Paolo Bonzini
parent 410573aa2c
commit c04649eeea

View File

@ -45,7 +45,7 @@ static inline void seqlock_write_end(QemuSeqLock *sl)
atomic_set(&sl->sequence, sl->sequence + 1);
}
static inline unsigned seqlock_read_begin(QemuSeqLock *sl)
static inline unsigned seqlock_read_begin(const QemuSeqLock *sl)
{
/* Always fail if a write is in progress. */
unsigned ret = atomic_read(&sl->sequence);