linux-kernel - [PATCH] KVM: selftests: Remove redundant setbuf()

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Date:   Fri,  3 Feb 2023 14:10:36 +0800
From:   shahuang@...hat.com
To:     kvm@...r.kernel.org
Cc:     Shaoqin Huang <shahuang@...hat.com>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Shuah Khan <shuah@...nel.org>,
        Sean Christopherson <seanjc@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:KERNEL VIRTUAL
        MACHINE FOR ARM64 (KVM/arm64)),
        kvmarm@...ts.linux.dev (open list:KERNEL VIRTUAL MACHINE FOR ARM64
        (KVM/arm64)),
        kvmarm@...ts.cs.columbia.edu (moderated list:KERNEL VIRTUAL MACHINE FOR
        ARM64 (KVM/arm64)),
        linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] KVM: selftests: Remove redundant setbuf()

From: Shaoqin Huang <shahuang@...hat.com>

Since setbuf(stdout, NULL) has been called in kvm_util.c with
__attribute((constructor)). Selftests no need to setup it in their own
code.

Signed-off-by: Shaoqin Huang <shahuang@...hat.com>
---
 tools/testing/selftests/kvm/aarch64/page_fault_test.c          | 2 --
 .../selftests/kvm/x86_64/exit_on_emulation_failure_test.c      | 3 ---
 2 files changed, 5 deletions(-)

diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
index beb944fa6fd4..513b20bec3c2 100644
--- a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
+++ b/tools/testing/selftests/kvm/aarch64/page_fault_test.c
@@ -1093,8 +1093,6 @@ int main(int argc, char *argv[])
 	enum vm_mem_backing_src_type src_type;
 	int opt;
 
-	setbuf(stdout, NULL);
-
 	src_type = DEFAULT_VM_MEM_SRC;
 
 	while ((opt = getopt(argc, argv, "hm:s:")) != -1) {
diff --git a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
index 37c61f712fd5..e334844d6e1d 100644
--- a/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
+++ b/tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
@@ -26,9 +26,6 @@ int main(int argc, char *argv[])
 	struct kvm_vcpu *vcpu;
 	struct kvm_vm *vm;
 
-	/* Tell stdout not to buffer its content */
-	setbuf(stdout, NULL);
-
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_EXIT_ON_EMULATION_FAILURE));
 
 	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
-- 
2.39.0