Defining FIO_HAVE_IOSCHED_SWITCH currently equals saying it's Linux,
as switch_ioscheduler() only works on Linux kernel with "scheduler"
sysfs entry (though read/write to sysfs obviously compiles on others).
This commit makes the function return 0 if FIO_HAVE_IOSCHED_SWITCH
is undefined (i.e. if not Linux). This is essentially the same as
{diskutil,cgroup,blktrace}.c being compiled only on Linux.
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@xxxxxxxxx>
---
backend.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/backend.c b/backend.c
index ad2d7da..2f290d2 100644
--- a/backend.c
+++ b/backend.c
@@ -1261,6 +1261,7 @@ static int init_io_u(struct thread_data *td)
static int switch_ioscheduler(struct thread_data *td)
{
+#ifdef FIO_HAVE_IOSCHED_SWITCH
char tmp[256], tmp2[128];
FILE *f;
int ret;
@@ -1319,6 +1320,9 @@ static int switch_ioscheduler(struct thread_data *td)
fclose(f);
return 0;
+#else
+ return 0;
+#endif
}
static bool keep_running(struct thread_data *td)
--
1.7.1
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