rename syscall error with the .55.and .56 kernels

Hi, Marly (our intern) discovered a problem in the rename syscall. We tried many versions, and up to 51 this problem was not happening (52 and 53 did not boot for us). The test we are running is part of LTP and it is rename04.c (under ltp-full/testcases/kernel/syscalls/rename) The test does the following: - create temp directory (ex /tmp/dir1) - create another temp directory ( ex /tmp/dir2) and create a file in it (ex /tmp/dir2/foo) - perform the rename syscall rename(/tmp/dir1, /tmp/dir2) The test is expecting this call to fail with an errno of ENOTEMPTY (As documented in the man pages). This call returns an unexpected 0, however the renaming does not actually occur and the two directories remain unchanged. We saw this behavior on x86_64, i386 - loulwa & Marly