ring-buffer: use BUF_PAGE_HDR_SIZE in calculating index

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The index of the event is found by masking PAGE_MASK to it and
subtracting the header size. Currently the header size is calculate
by PAGE_SIZE - BUF_PAGE_SIZE, when we already have a macro
BUF_PAGE_HDR_SIZE to define it.

If we want to change BUF_PAGE_SIZE to something less than filling
the rest of the page (this is done for debugging), then we break
the algorithm to find the index.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Steven Rostedt 2009-06-11 09:29:58 -04:00 • committed by Steven Rostedt

parent 44ad18e0a6

commit 22f470f8da

1 changed files with 1 additions and 1 deletions

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kernel/trace/ring_buffer.c

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