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libspl: implement atomics in terms of atomics

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This replaces the generic libspl atomic.c atomics implementation
with one based on builtin gcc atomics.  This functionality was added
as an experimental feature in gcc 4.4.  Today even CentOS 7 ships
with gcc 4.8 as the default compiler we can make this the default.

Furthermore, the builtin atomics are as good or better than our
hand-rolled implementation so it's reasonable to drop that custom code.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #11904
Closes #12252
Closes #12244
This commit is contained in:
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2021-04-19 07:13:24 +02:00
committed by Brian Behlendorf
parent 3de7aeb68a
commit 9a865b7fb7
8 changed files with 84 additions and 1697 deletions
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cmd/zed/Makefile.am
+1 -1
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@@ -45,7 +45,7 @@ zed_LDADD = \
$(abs_top_builddir)/lib/libnvpair/libnvpair.la \
$(abs_top_builddir)/lib/libuutil/libuutil.la
zed_LDADD += -lrt $(LIBUDEV_LIBS) $(LIBUUID_LIBS)
zed_LDADD += -lrt $(LIBATOMIC_LIBS) $(LIBUDEV_LIBS) $(LIBUUID_LIBS)
zed_LDFLAGS = -pthread
EXTRA_DIST = agents/README.md