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locking/atomics: Use read-write instrumentation for atomic RMWs 

Use instrument_atomic_read_write() for atomic RMW ops.

Cc: Will Deacon <will@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
zero-sugar-mainline-defconfig
Marco Elver 2020-07-24 09:00:08 +02:00 committed by Paul E. McKenney
parent b159eeccb7
commit 3570a1bcf4
2 changed files with 180 additions and 171 deletions
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330
include/asm-generic/atomic-instrumented.h
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File diff suppressed because it is too large Load Diff

21
scripts/atomic/gen-atomic-instrumented.sh
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@ -5,9 +5,10 @@ ATOMICDIR=$(dirname $0)
. ${ATOMICDIR}/atomic-tbl.sh
#gen_param_check(arg)
#gen_param_check(meta, arg)
gen_param_check()
{
local meta="$1"; shift
local arg="$1"; shift
local type="${arg%%:*}"
local name="$(gen_param_name "${arg}")"
@ -17,17 +18,25 @@ gen_param_check()
i) return;;
esac
# We don't write to constant parameters
[ ${type#c} != ${type} ] && rw="read"
if [ ${type#c} != ${type} ]; then
# We don't write to constant parameters.
rw="read"
elif [ "${meta}" != "s" ]; then
# An atomic RMW: if this parameter is not a constant, and this atomic is
# not just a 's'tore, this parameter is both read from and written to.
rw="read_write"
fi
printf "\tinstrument_atomic_${rw}(${name}, sizeof(*${name}));\n"
}
#gen_param_check(arg...)
#gen_params_checks(meta, arg...)
gen_params_checks()
{
local meta="$1"; shift
while [ "$#" -gt 0 ]; do
gen_param_check "$1"
gen_param_check "$meta" "$1"
shift;
done
}
@ -77,7 +86,7 @@ gen_proto_order_variant()
local ret="$(gen_ret_type "${meta}" "${int}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local checks="$(gen_params_checks "$@")"
local checks="$(gen_params_checks "${meta}" "$@")"
local args="$(gen_args "$@")"
local retstmt="$(gen_ret_stmt "${meta}")"