anchao opened a new pull request, #7414:
URL: https://github.com/apache/incubator-nuttx/pull/7414
## Summary
arch/armv6-m: fix compile error on LLVM clang
```
armv6-m/arm_exception.S:139:2: error: invalid instruction, any one of the
following would fix this:
sub r1, #(4 * (10))
^
armv6-m/arm_exception.S:139:2: note: instruction requires: thumb2
sub r1, #(4 * (10))
^
armv6-m/arm_exception.S:139:10: note: invalid operand for instruction
sub r1, #(4 * (10))
^
armv6-m/arm_exception.S:139:2: note: no flag-preserving variant of this
instruction available
sub r1, #(4 * (10))
^
armv6-m/arm_exception.S:139:10: note: operand must be a register in range
[r0, r7]
sub r1, #(4 * (10))
^
```
```
bringup.c:125:18: warning: variable 'ret' is uninitialized when used here
[-Wuninitialized]
return ret;
^~~
bringup.c:73:10: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
```
## Impact
N/A
## Testing
CI check
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