[kvm-unit-tests PATCH 6/6] runtime: make the MAX_SMP loop a function

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We can now source scripts/runtime.bash multiple times without
always running the MAX_SMP loop. runtime.bash is now ready to
be sourced by arch run scripts (when not running in standalone
mode). Patches coming soon will add a couple of arch-neutral
functions to the arch run scripts.

Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
---
 run_tests.sh            |  2 ++
 scripts/mkstandalone.sh |  1 +
 scripts/runtime.bash    | 12 +++++++++---
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/run_tests.sh b/run_tests.sh
index 558b8e7431d8e..c0c5a72b1ceee 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -28,6 +28,8 @@ EOF
 RUNTIME_arch_run="./$TEST_DIR/run"
 source scripts/runtime.bash
 
+probe_max_smp
+
 while getopts "g:hv" opt; do
     case $opt in
         g)
diff --git a/scripts/mkstandalone.sh b/scripts/mkstandalone.sh
index b0f1e7c098afb..c31a5f10519a1 100755
--- a/scripts/mkstandalone.sh
+++ b/scripts/mkstandalone.sh
@@ -60,6 +60,7 @@ generate_test ()
 
 	cat scripts/runtime.bash
 
+	echo probe_max_smp
 	echo "run ${args[@]}"
 }
 
diff --git a/scripts/runtime.bash b/scripts/runtime.bash
index 63d1b9653007b..dd700f24cffa3 100644
--- a/scripts/runtime.bash
+++ b/scripts/runtime.bash
@@ -1,5 +1,9 @@
 : "${RUNTIME_arch_run?}"
 
+if [ -z "$MAX_SMP" ]; then
+    MAX_SMP=$(getconf _NPROCESSORS_CONF)
+fi
+
 qemu=${QEMU:-qemu-system-$ARCH}
 
 function run()
@@ -57,7 +61,6 @@ function run()
     return $ret
 }
 
-MAX_SMP=$(getconf _NPROCESSORS_CONF)
 #
 # Probe for MAX_SMP, in case it's less than the number of host cpus.
 #
@@ -67,7 +70,10 @@ MAX_SMP=$(getconf _NPROCESSORS_CONF)
 # "arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS'". So, at some
 # point when maintaining the while loop gets too tiresome, we can
 # just remove it...
-while $RUNTIME_arch_run _NO_FILE_4Uhere_ -smp $MAX_SMP \
+function probe_max_smp()
+{
+    while $RUNTIME_arch_run _NO_FILE_4Uhere_ -smp $MAX_SMP \
 		|& grep -qi 'exceeds max CPUs'; do
 	((--MAX_SMP))
-done
+    done
+}
-- 
2.4.3

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