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-rw-r--r--sysdeps/unix/sysv/linux/tst-ofdlocks-compat.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-ofdlocks-compat.c b/sysdeps/unix/sysv/linux/tst-ofdlocks-compat.c
index d1d00eb3fb..03c4abfeff 100644
--- a/sysdeps/unix/sysv/linux/tst-ofdlocks-compat.c
+++ b/sysdeps/unix/sysv/linux/tst-ofdlocks-compat.c
@@ -40,6 +40,14 @@ do_prepare (int argc, char **argv)
#define PREPARE do_prepare
+/* Linux between 4.13 and 4.15 return EOVERFLOW for LFS OFD locks usage
+ in compat mode (non-LFS ABI running on a LFS default kernel, such as
+ i386 on a x86_64 kernel or s390-32 on a s390-64 kernel) [1]. This is
+ a kernel issue because __NR_fcntl64 is the expected way to use OFD locks
+ (used on GLIBC for both fcntl and fcntl64).
+
+ [1] https://sourceware.org/ml/libc-alpha/2018-07/msg00243.html */
+
static int
do_test (void)
{