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bcachefs: Heap allocate printbufs

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This patch changes printbufs dynamically allocate and reallocate a
buffer as needed. Stack usage has become a bit of a problem, and a major
cause of that has been static size string buffers on the stack.

The most involved part of this refactoring is that printbufs must now be
exited with printbuf_exit().

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-02-25 13:18:19 -05:00 • committed by Kent Overstreet
commit fa8e94faee
28 changed files with 808 additions and 620 deletions
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