[1/4] trace-cmd kvm timesync: Use stat() in kvm_scaling_check_vm_cpu()

Commit Message

Steven Rostedt May 22, 2022, 12:39 a.m. UTC

From: "Steven Rostedt (Google)" <[e-mail]>

kvm_scaling_check_vm_cpu() uses read_ll_from_file() to determine if the
kvm scaling and fraction files exist. The read_ll_from_file() does not
return if the contents of the files are legit or not. No need to read
them in this file. Just use stat().

Signed-off-by: Steven Rostedt (Google) <[e-mail]>
---
 lib/trace-cmd/trace-timesync-kvm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Patch

diff --git a/lib/trace-cmd/trace-timesync-kvm.c b/lib/trace-cmd/trace-timesync-kvm.c
index 12a22d4c4d6a..a645fa2cc70b 100644
--- a/lib/trace-cmd/trace-timesync-kvm.c
+++ b/lib/trace-cmd/trace-timesync-kvm.c
@@ -75,22 +75,22 @@  static int read_ll_from_file(char *file, long long *res)
 
 static bool kvm_scaling_check_vm_cpu(char *vname, char *cpu)
 {
-	long long scaling, frac;
 	bool has_scaling = false;
 	bool has_frac = false;
+	struct stat st;
 	char *path;
 	int ret;
 
 	if (asprintf(&path, "%s/%s/%s", vname, cpu, KVM_DEBUG_SCALING_FILE) < 0)
 		return false;
-	ret = read_ll_from_file(path, &scaling);
+	ret = stat(path, &st);
 	free(path);
 	if (!ret)
 		has_scaling = true;
 
 	if (asprintf(&path, "%s/%s/%s", vname, cpu, KVM_DEBUG_FRACTION_FILE) < 0)
 		return false;
-	ret = read_ll_from_file(path, &frac);
+	ret = stat(path, &st);
 	free(path);
 	if (!ret)
 		has_frac = true;