diff options
| author | Zhen Lei <thunder.leizhen@huawei.com> | 2022-11-28 14:42:42 +0300 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-11-28 14:57:36 +0300 |
| commit | 21d0798acf85e9ff8a6c7d8918df7d98e145d688 (patch) | |
| tree | 4a7ec856ba0a2a8770c01c3b5d04462be867c945 /arch/arm/kernel/traps.c | |
| parent | 59e2cf8d21e05391c42628eb9fb5bb40f9d9698f (diff) | |
| download | linux-21d0798acf85e9ff8a6c7d8918df7d98e145d688.tar.xz | |
ARM: 9276/1: Refactor dump_instr()
1. Rename local variable 'val16' to 'tmp'. So that the processing
statements of thumb and arm can be aligned.
2. Fix two sparse check warnings: (add __user for type conversion)
warning: incorrect type in initializer (different address spaces)
expected unsigned short [noderef] __user *register __p
got unsigned short [usertype] *
3. Prepare for the next patch to avoid repeated judgment.
Before:
if (!user_mode(regs)) {
if (thumb)
else
} else {
if (thumb)
else
}
After:
if (thumb) {
if (user_mode(regs))
else
} else {
if (user_mode(regs))
else
}
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/kernel/traps.c')
| -rw-r--r-- | arch/arm/kernel/traps.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 20b2db6dcd1c..a92e07637395 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -178,19 +178,20 @@ static void dump_instr(const char *lvl, struct pt_regs *regs) for (i = -4; i < 1 + !!thumb; i++) { unsigned int val, bad; - if (!user_mode(regs)) { - if (thumb) { - u16 val16; - bad = get_kernel_nofault(val16, &((u16 *)addr)[i]); - val = val16; - } else { - bad = get_kernel_nofault(val, &((u32 *)addr)[i]); - } + if (thumb) { + u16 tmp; + + if (user_mode(regs)) + bad = get_user(tmp, &((u16 __user *)addr)[i]); + else + bad = get_kernel_nofault(tmp, &((u16 *)addr)[i]); + + val = tmp; } else { - if (thumb) - bad = get_user(val, &((u16 *)addr)[i]); + if (user_mode(regs)) + bad = get_user(val, &((u32 __user *)addr)[i]); else - bad = get_user(val, &((u32 *)addr)[i]); + bad = get_kernel_nofault(val, &((u32 *)addr)[i]); } if (!bad) |