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d05073adda
hashmap__new may return an ERR_PTR and previously this would be
assigned to syscall_stats meaning all use of syscall_stats needs to
test for NULL (uninitialized) or an ERR_PTR. Given the only reason
hashmap__new can fail is ENOMEM, just use NULL to indicate the
allocation failure and avoid the code having to test for NULL and
IS_ERR.
Fixes: 96f202eab8 (perf trace: Fix IS_ERR() vs NULL check bug)
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>