[lwip-devel] [bug #21075] pbuf_realloc() use with PBUF_RAM and MEM_LIBC_MALLOC fails

[Simon Goldschmidt]

Follow-up Comment #2, bug #21075 (project lwip):

> So, I think the simplest thing to do is to replace in mem.h, line 68:
> #define mem_realloc(x, size) realloc(x,size)
> by
> #define mem_realloc(mem, size) (mem)

I also think that's the best idea, since I don't think it's performant to
really use realloc() just to shrink a pbuf's payload size.

Also, I'm not sure this would really work, using realloc()  might need some
modifications on the whole core code so that a payload pointer is not being
saved... And since MEM_LIBC_MALLOC was originally only a workaroung for the
broken mem_malloc(), I think that defining mem_realloc to doing nothing is
best.

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