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[PULL 2/4] target/riscv/kvm: fix shadowing in kvm_riscv_(get|put)_regs_c
From: |
Philippe Mathieu-Daudé |
Subject: |
[PULL 2/4] target/riscv/kvm: fix shadowing in kvm_riscv_(get|put)_regs_csr |
Date: |
Mon, 4 Dec 2023 16:25:22 +0100 |
From: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
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 <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20231123101338.1040134-1-dbarboza@ventanamicro.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
target/riscv/kvm/kvm-cpu.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index 78fa1fa162..45b6cf1cfa 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)
--
2.41.0