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-rw-r--r--arch/alpha/include/asm/futex.h2
-rw-r--r--arch/alpha/kernel/perf_event.c4
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/alpha/include/asm/futex.h b/arch/alpha/include/asm/futex.h
index e8a761aee088..f939794363ac 100644
--- a/arch/alpha/include/asm/futex.h
+++ b/arch/alpha/include/asm/futex.h
@@ -108,7 +108,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" lda $31,3b-2b(%0)\n"
" .previous\n"
: "+r"(ret), "=&r"(prev), "=&r"(cmp)
- : "r"(uaddr), "r"((long)oldval), "r"(newval)
+ : "r"(uaddr), "r"((long)(int)oldval), "r"(newval)
: "memory");
*uval = prev;
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index 8143cd7cdbfb..0dae252f7a33 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -685,6 +685,10 @@ static int alpha_pmu_event_init(struct perf_event *event)
{
int err;
+ /* does not support taken branch sampling */
+ if (has_branch_stack(event))
+ return -EOPNOTSUPP;
+
switch (event->attr.type) {
case PERF_TYPE_RAW:
case PERF_TYPE_HARDWARE:
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