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The __read_token() function has some duplicated code to handle internal buffer overflow. Factor them out to new extend_token(). According to the man pages of realloc/free(3), they can handle NULL pointer input so that it can be ended up to compact the code. Also handle error path correctly. Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1333940074-19052-4-git-send-email-namhyung.kim@lge.com [rostedt@goodmis.org: added some extra whitespace] Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>