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The function uses the bash-specific [[ ... ]] conditional, but zram selftests source this file while running under /bin/sh. On systems where /bin/sh is dash, such as Debian, the following test fails: dash -c ' kernel_major=3D6; kernel_minor=3D1; major=3D6; minor=3D0 if [ $kernel_major -gt $major ]; then echo ok elif [[ $kernel_major -eq $major && $kernel_minor -ge $minor ]]; then echo ok fi' with: dash: 5: [[: not found Use separate POSIX test expressions joined by && instead. Fixes: fc4eb486a59d ("selftests/zram: Skip max_comp_streams interface on ne= wer kernel") Signed-off-by: Cheng-Han Wu --- tools/testing/selftests/zram/zram_lib.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/zram/zram_lib.sh b/tools/testing/selft= ests/zram/zram_lib.sh index 21ec1966de76..0d44d83888f9 100755 --- a/tools/testing/selftests/zram/zram_lib.sh +++ b/tools/testing/selftests/zram/zram_lib.sh @@ -37,7 +37,7 @@ kernel_gte() =20 if [ $kernel_major -gt $major ]; then return 0 - elif [[ $kernel_major -eq $major && $kernel_minor -ge $minor ]]; then + elif [ $kernel_major -eq $major ] && [ $kernel_minor -ge $minor ]; then return 0 fi =20 --=20 2.52.0