[PATCH] powerpc/ptrace: Fix cppcheck issue in gpr32_set_common/gpr32_get_common.

[wei . guo . simon]

From: Simon Guo <wei.guo.si...@gmail.com>

The ckpt_regs usage in gpr32_set_common/gpr32_get_common()
will lead to cppcheck error.

[arch/powerpc/kernel/ptrace.c:2062]: (error) Uninitialized variable: ckpt_regs
[arch/powerpc/kernel/ptrace.c:2130]: (error) Uninitialized variable: ckpt_regs

A straightforward fix to clean it.

Reported-by: Daniel Axtens <d...@axtens.net>
Signed-off-by: Simon Guo <wei.guo.si...@gmail.com>
---
 arch/powerpc/kernel/ptrace.c | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 4f3c575..ae02377 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -2046,21 +2046,23 @@ static const struct user_regset_view 
user_ppc_native_view = {
 static int gpr32_get_common(struct task_struct *target,
                     const struct user_regset *regset,
                     unsigned int pos, unsigned int count,
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
                            void *kbuf, void __user *ubuf, bool tm_active)
+#else
+                           void *kbuf, void __user *ubuf)
+#endif
 {
        const unsigned long *regs = &target->thread.regs->gpr[0];
-       const unsigned long *ckpt_regs;
        compat_ulong_t *k = kbuf;
        compat_ulong_t __user *u = ubuf;
        compat_ulong_t reg;
        int i;
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-       ckpt_regs = &target->thread.ckpt_regs.gpr[0];
-#endif
        if (tm_active) {
-               regs = ckpt_regs;
+               regs = &target->thread.ckpt_regs.gpr[0];
        } else {
+#endif
                if (target->thread.regs == NULL)
                        return -EIO;
 
@@ -2072,7 +2074,9 @@ static int gpr32_get_common(struct task_struct *target,
                        for (i = 14; i < 32; i++)
                                target->thread.regs->gpr[i] = NV_REG_POISON;
                }
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
        }
+#endif
 
        pos /= sizeof(reg);
        count /= sizeof(reg);
@@ -2114,28 +2118,31 @@ static int gpr32_get_common(struct task_struct *target,
 static int gpr32_set_common(struct task_struct *target,
                     const struct user_regset *regset,
                     unsigned int pos, unsigned int count,
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
                     const void *kbuf, const void __user *ubuf, bool tm_active)
+#else
+                    const void *kbuf, const void __user *ubuf)
+#endif
 {
        unsigned long *regs = &target->thread.regs->gpr[0];
-       unsigned long *ckpt_regs;
        const compat_ulong_t *k = kbuf;
        const compat_ulong_t __user *u = ubuf;
        compat_ulong_t reg;
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-       ckpt_regs = &target->thread.ckpt_regs.gpr[0];
-#endif
-
        if (tm_active) {
-               regs = ckpt_regs;
+               regs = &target->thread.ckpt_regs.gpr[0];
        } else {
+#endif
                regs = &target->thread.regs->gpr[0];
 
                if (target->thread.regs == NULL)
                        return -EIO;
 
                CHECK_FULL_REGS(target->thread.regs);
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
        }
+#endif
 
        pos /= sizeof(reg);
        count /= sizeof(reg);
@@ -2218,7 +2225,11 @@ static int gpr32_get(struct task_struct *target,
                     unsigned int pos, unsigned int count,
                     void *kbuf, void __user *ubuf)
 {
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
        return gpr32_get_common(target, regset, pos, count, kbuf, ubuf, 0);
+#else
+       return gpr32_get_common(target, regset, pos, count, kbuf, ubuf);
+#endif
 }
 
 static int gpr32_set(struct task_struct *target,
@@ -2226,7 +2237,11 @@ static int gpr32_set(struct task_struct *target,
                     unsigned int pos, unsigned int count,
                     const void *kbuf, const void __user *ubuf)
 {
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
        return gpr32_set_common(target, regset, pos, count, kbuf, ubuf, 0);
+#else
+       return gpr32_set_common(target, regset, pos, count, kbuf, ubuf);
+#endif
 }
 
 /*
-- 
1.8.3.1