linux-kernel - [PATCH v2 5/5] riscv: kvm: use ".L" local labels in assembly when applicable

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Date:   Tue, 24 Oct 2023 15:26:55 +0200
From:   Clément Léger <cleger@...osinc.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Andrew Jones <ajones@...tanamicro.com>
Cc:     Clément Léger <cleger@...osinc.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org
Subject: [PATCH v2 5/5] riscv: kvm: use ".L" local labels in assembly when applicable

For the sake of coherency, use local labels in assembly when
applicable. This also avoid kprobes being confused when applying a
kprobe since the size of function is computed by checking where the
next visible symbol is located. This might end up in computing some
function size to be way shorter than expected and thus failing to apply
kprobes to the specified offset.

Signed-off-by: Clément Léger <cleger@...osinc.com>
Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
---
 arch/riscv/kvm/vcpu_switch.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/kvm/vcpu_switch.S b/arch/riscv/kvm/vcpu_switch.S
index 8b18473780ac..0c26189aa01c 100644
--- a/arch/riscv/kvm/vcpu_switch.S
+++ b/arch/riscv/kvm/vcpu_switch.S
@@ -45,7 +45,7 @@ SYM_FUNC_START(__kvm_riscv_switch_to)
 	REG_L	t0, (KVM_ARCH_GUEST_SSTATUS)(a0)
 	REG_L	t1, (KVM_ARCH_GUEST_HSTATUS)(a0)
 	REG_L	t2, (KVM_ARCH_GUEST_SCOUNTEREN)(a0)
-	la	t4, __kvm_switch_return
+	la	t4, .Lkvm_switch_return
 	REG_L	t5, (KVM_ARCH_GUEST_SEPC)(a0)
 
 	/* Save Host and Restore Guest SSTATUS */
@@ -113,7 +113,7 @@ SYM_FUNC_START(__kvm_riscv_switch_to)
 
 	/* Back to Host */
 	.align 2
-__kvm_switch_return:
+.Lkvm_switch_return:
 	/* Swap Guest A0 with SSCRATCH */
 	csrrw	a0, CSR_SSCRATCH, a0
 
-- 
2.42.0