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YAMAMOTO Takashi
f2aeb5e56f
This would avoid the undesirable intertactions with the serial driver described in https://github.com/apache/nuttx/issues/14662. Although I'm not entirely happy with this fix because it assumes the particular implementations of up_putc/up_nputc and its association to the serial devices, I haven't come up with better ideas for now. An alternative is to place some serializations inside the target specific serial (and/or whatever provides up_putc api) implementaitons. But it isn't too attractive to put potentially complex logic into the low-level machinaries, especially when we have a lot of similar copies of it. Another alternative is to deprecate up_putc. (at least for the purpose of syslog.) But it seems at least some of users are relying on what the current implementation provides heavily. This commit also removes g_lowputs_lock because the critical section would serve the purpose of the lock as well.