linux-kernel - [PATCH v2 141/144] KVM: selftests: Return an 'unsigned int' from kvm_check

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Message-Id: <20220603004331.1523888-142-seanjc@google.com>
Date:   Fri,  3 Jun 2022 00:43:28 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, Vitaly Kuznetsov <vkuznets@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 141/144] KVM: selftests: Return an 'unsigned int' from kvm_check_cap()

Return an 'unsigned int' instead of a signed 'int' from kvm_check_cap(),
to make it more obvious that kvm_check_cap() can never return a negative
value due to its assertion that the return is ">= 0".

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/include/kvm_util_base.h | 2 +-
 tools/testing/selftests/kvm/kvm_binary_stats_test.c | 2 +-
 tools/testing/selftests/kvm/lib/kvm_util.c          | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 1c762988ab9c..72cc0ecda067 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -167,7 +167,7 @@ extern const struct vm_guest_mode_params vm_guest_mode_params[];
 
 int open_path_or_exit(const char *path, int flags);
 int open_kvm_dev_path_or_exit(void);
-int kvm_check_cap(long cap);
+unsigned int kvm_check_cap(long cap);
 
 #define __KVM_SYSCALL_ERROR(_name, _ret) \
 	"%s failed, rc: %i errno: %i (%s)", (_name), (_ret), errno, strerror(errno)
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
index 7f2ddc1535d7..982bf3f7d9c5 100644
--- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c
+++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c
@@ -213,7 +213,7 @@ int main(int argc, char *argv[])
 	}
 
 	/* Check the extension for binary stats */
-	if (kvm_check_cap(KVM_CAP_BINARY_STATS_FD) <= 0) {
+	if (!kvm_check_cap(KVM_CAP_BINARY_STATS_FD)) {
 		print_skip("Binary form statistics interface is not supported");
 		exit(KSFT_SKIP);
 	}
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 2dcd83a03cc2..8f7ee9cb551c 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -69,7 +69,7 @@ int open_kvm_dev_path_or_exit(void)
  * Looks up and returns the value corresponding to the capability
  * (KVM_CAP_*) given by cap.
  */
-int kvm_check_cap(long cap)
+unsigned int kvm_check_cap(long cap)
 {
 	int ret;
 	int kvm_fd;
-- 
2.36.1.255.ge46751e96f-goog