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authorMichael Forney <mforney@mforney.org>2019-06-17 22:33:06 -0700
committerIngo Molnar <mingo@kernel.org>2019-06-25 10:17:07 +0200
commitebf8d82bbb32720878a3867b28e655950ccee992 (patch)
treec9c99ac58cb352cff16a040e46cb165b8465e589
parent886532aee3cd42d95196601ed16d7c3d4679e9e5 (diff)
locking/atomics: Use sed(1) instead of non-standard head(1) option
POSIX says the -n option must be a positive decimal integer. Not all implementations of head(1) support negative numbers meaning offset from the end of the file. Instead, the sed expression '$d' has the same effect of removing the last line of the file. Signed-off-by: Michael Forney <mforney@mforney.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190618053306.730-1-mforney@mforney.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rwxr-xr-xscripts/atomic/check-atomics.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/atomic/check-atomics.sh b/scripts/atomic/check-atomics.sh
index cfa0c2f71c84..8378c63a1e09 100755
--- a/scripts/atomic/check-atomics.sh
+++ b/scripts/atomic/check-atomics.sh
@@ -22,7 +22,7 @@ while read header; do
OLDSUM="$(tail -n 1 ${LINUXDIR}/include/${header})"
OLDSUM="${OLDSUM#// }"
- NEWSUM="$(head -n -1 ${LINUXDIR}/include/${header} | sha1sum)"
+ NEWSUM="$(sed '$d' ${LINUXDIR}/include/${header} | sha1sum)"
NEWSUM="${NEWSUM%% *}"
if [ "${OLDSUM}" != "${NEWSUM}" ]; then