From 560b8e1d7071e20ec14af2cc0b7096db50a0ca5c Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Thu, 23 Nov 2023 07:13:38 -0300 Subject: target/riscv/kvm: fix shadowing in kvm_riscv_(get|put)_regs_csr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit KVM_RISCV_GET_CSR() and KVM_RISCV_SET_CSR() use an 'int ret' variable that is used to do an early 'return' if ret > 0. Both are being called in functions that are also declaring a 'ret' integer, initialized with '0', and this integer is used as return of the function. The result is that the compiler is less than pleased and is pointing shadowing errors: ../target/riscv/kvm/kvm-cpu.c: In function 'kvm_riscv_get_regs_csr': ../target/riscv/kvm/kvm-cpu.c:90:13: error: declaration of 'ret' shadows a previous local [-Werror=shadow=compatible-local] 90 | int ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ | ^~~ ../target/riscv/kvm/kvm-cpu.c:539:5: note: in expansion of macro 'KVM_RISCV_GET_CSR' 539 | KVM_RISCV_GET_CSR(cs, env, sstatus, env->mstatus); | ^~~~~~~~~~~~~~~~~ ../target/riscv/kvm/kvm-cpu.c:536:9: note: shadowed declaration is here 536 | int ret = 0; | ^~~ ../target/riscv/kvm/kvm-cpu.c: In function 'kvm_riscv_put_regs_csr': ../target/riscv/kvm/kvm-cpu.c:98:13: error: declaration of 'ret' shadows a previous local [-Werror=shadow=compatible-local] 98 | int ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ | ^~~ ../target/riscv/kvm/kvm-cpu.c:556:5: note: in expansion of macro 'KVM_RISCV_SET_CSR' 556 | KVM_RISCV_SET_CSR(cs, env, sstatus, env->mstatus); | ^~~~~~~~~~~~~~~~~ ../target/riscv/kvm/kvm-cpu.c:553:9: note: shadowed declaration is here 553 | int ret = 0; | ^~~ The macros are doing early returns for non-zero returns and the local 'ret' variable for both functions is used just to do 'return 0', so remove them from kvm_riscv_get_regs_csr() and kvm_riscv_put_regs_csr() and do a straight 'return 0' in the end. For good measure let's also rename the 'ret' variables in KVM_RISCV_GET_CSR() and KVM_RISCV_SET_CSR() to '_ret' to make them more resilient to these kind of errors. Fixes: 937f0b4512 ("target/riscv: Implement kvm_arch_get_registers") Signed-off-by: Daniel Henrique Barboza Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé Reviewed-by: Alistair Francis Message-ID: <20231123101338.1040134-1-dbarboza@ventanamicro.com> Signed-off-by: Philippe Mathieu-Daudé --- target/riscv/kvm/kvm-cpu.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'target') diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index 78fa1fa..45b6cf1 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -87,17 +87,17 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, #define KVM_RISCV_GET_CSR(cs, env, csr, reg) \ do { \ - int ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ - if (ret) { \ - return ret; \ + int _ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ + if (_ret) { \ + return _ret; \ } \ } while (0) #define KVM_RISCV_SET_CSR(cs, env, csr, reg) \ do { \ - int ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ - if (ret) { \ - return ret; \ + int _ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), ®); \ + if (_ret) { \ + return _ret; \ } \ } while (0) @@ -533,7 +533,6 @@ static int kvm_riscv_put_regs_core(CPUState *cs) static int kvm_riscv_get_regs_csr(CPUState *cs) { - int ret = 0; CPURISCVState *env = &RISCV_CPU(cs)->env; KVM_RISCV_GET_CSR(cs, env, sstatus, env->mstatus); @@ -545,12 +544,12 @@ static int kvm_riscv_get_regs_csr(CPUState *cs) KVM_RISCV_GET_CSR(cs, env, stval, env->stval); KVM_RISCV_GET_CSR(cs, env, sip, env->mip); KVM_RISCV_GET_CSR(cs, env, satp, env->satp); - return ret; + + return 0; } static int kvm_riscv_put_regs_csr(CPUState *cs) { - int ret = 0; CPURISCVState *env = &RISCV_CPU(cs)->env; KVM_RISCV_SET_CSR(cs, env, sstatus, env->mstatus); @@ -563,7 +562,7 @@ static int kvm_riscv_put_regs_csr(CPUState *cs) KVM_RISCV_SET_CSR(cs, env, sip, env->mip); KVM_RISCV_SET_CSR(cs, env, satp, env->satp); - return ret; + return 0; } static int kvm_riscv_get_regs_fp(CPUState *cs) -- cgit v1.1