Fix: Build ftrace probe on kernels prior to 4.12

[lttng-modules.git] / probes / Kbuild

diff --git a/probes/Kbuild b/probes/Kbuild
index 90e9805ce41215f678f706a478b853855e7913d1..78bf3fb229380cfbb8d6b06e73ea46f67b946b71 100644 (file)
--- a/probes/Kbuild
+++ b/probes/Kbuild
@@ -12,6 +12,11 @@ obj-$(CONFIG_LTTNG) += lttng-probe-module.o
 obj-$(CONFIG_LTTNG) += lttng-probe-power.o
 obj-$(CONFIG_LTTNG) += lttng-probe-statedump.o
 
+i2c_dep = $(srctree)/include/trace/events/i2c.h
+ifneq ($(wildcard $(i2c_dep)),)
+  obj-$(CONFIG_LTTNG) += lttng-probe-i2c.o
+endif
+
 ifneq ($(CONFIG_KVM),)
   obj-$(CONFIG_LTTNG) += lttng-probe-kvm.o
   ifneq ($(CONFIG_X86),)
@@ -23,11 +28,11 @@ ifneq ($(CONFIG_KVM),)
         CFLAGS_lttng-probe-kvm-x86-mmu.o += -I$(srctree)/virt/kvm
         obj-$(CONFIG_LTTNG) +=  $(shell \
           if [ $(VERSION) -ge 3 \
-            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
+            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
             echo "lttng-probe-kvm-x86.o" ; fi;)
         obj-$(CONFIG_LTTNG) +=  $(shell \
           if [ $(VERSION) -ge 3 \
-            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
+            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
             echo "lttng-probe-kvm-x86-mmu.o" ; fi;)
       else
         $(warning File $(kvm_dep) not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.)
@@ -54,7 +59,7 @@ endif # CONFIG_X86
 
 obj-$(CONFIG_LTTNG) +=  $(shell \
   if [ $(VERSION) -ge 3 \
-    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
+    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
     echo "lttng-probe-signal.o" ; fi;)
 
 ifneq ($(CONFIG_BLOCK),)
@@ -69,7 +74,7 @@ ifneq ($(CONFIG_NET),)
   obj-$(CONFIG_LTTNG) += lttng-probe-skb.o
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 37 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 37 \) ] ; then \
       echo "lttng-probe-net.o" ; fi;)
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 4 \
@@ -84,7 +89,7 @@ endif # CONFIG_NET
 ifneq ($(CONFIG_SND_SOC),)
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
       echo "lttng-probe-asoc.o" ; fi;)
 endif # CONFIG_SND_SOC
 
@@ -92,13 +97,15 @@ ifneq ($(CONFIG_EXT3_FS),)
   ext3_dep = $(srctree)/fs/ext3/*.h
   ext3_dep_check = $(wildcard $(ext3_dep))
   ext3 = $(shell \
-    if [ $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
-      if [ \( $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 4 \) \) -a \
-        -z "$(ext3_dep_check)" ] ; then \
-        echo "warn" ; \
-        exit ; \
+    if [ $(VERSION) -lt 4 -o \( $(VERSION) -eq 4 -a $(PATCHLEVEL) -lt 3 \) ] ; then \
+      if [ $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
+        if [ \( $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 4 \) \) -a \
+          -z "$(ext3_dep_check)" ] ; then \
+          echo "warn" ; \
+          exit ; \
+        fi; \
+        echo "lttng-probe-ext3.o" ; \
       fi; \
-      echo "lttng-probe-ext3.o" ; \
     fi;)
   ifeq ($(ext3),warn)
     $(warning Files $(ext3_dep) not found. Probe "ext3" is disabled. Use full kernel source tree to enable it.)
@@ -127,30 +134,22 @@ endif # CONFIG_JBD
 ifneq ($(CONFIG_REGULATOR),)
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
       echo "lttng-probe-regulator.o" ; fi;)
 endif # CONFIG_REGULATOR
 
 ifneq ($(CONFIG_SCSI),)
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 35 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 35 \) ] ; then \
       echo "lttng-probe-scsi.o" ; fi;)
 endif # CONFIG_SCSI
 
-vmscan = $(shell \
+obj-$(CONFIG_LTTNG) += $(shell \
   if [ $(VERSION) -ge 3 \
-    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
+    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
     echo "lttng-probe-vmscan.o" ; fi;)
 
-ifneq ($(CONFIG_SWAP),)
-  obj-$(CONFIG_LTTNG) += $(vmscan)
-else
-  ifneq ($(CONFIG_CGROUP_MEM_RES_CTLR),)
-    obj-$(CONFIG_LTTNG) += $(vmscan)
-  endif # CONFIG_CGROUP_MEM_RES_CTLR
-endif # CONFIG_SWAP
-
 # lock probe does not work, so disabling it for now
 #ifneq ($(CONFIG_LOCKDEP),)
 #  obj-$(CONFIG_LTTNG) += lttng-probe-lock.o
@@ -160,7 +159,7 @@ ifneq ($(CONFIG_BTRFS_FS),)
   btrfs_dep = $(srctree)/fs/btrfs/*.h
   btrfs = $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 39 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 39 \) ] ; then \
       echo "lttng-probe-btrfs.o" ; fi;)
   ifneq ($(btrfs),)
     ifeq ($(wildcard $(btrfs_dep)),)
@@ -173,7 +172,7 @@ endif # CONFIG_BTRFS_FS
 
 obj-$(CONFIG_LTTNG) +=  $(shell \
   if [ $(VERSION) -ge 3 \
-    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
+    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
     echo "lttng-probe-compaction.o" ; fi;)
 
 ifneq ($(CONFIG_EXT4_FS),)
@@ -243,10 +242,12 @@ obj-$(CONFIG_LTTNG) += lttng-probe-workqueue.o
 ifneq ($(CONFIG_KALLSYMS_ALL),)
   obj-$(CONFIG_LTTNG) +=  $(shell \
     if [ $(VERSION) -ge 3 \
-      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -ge 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
+      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
       echo "lttng-probe-writeback.o" ; fi;)
 else
-  $(warning CONFIG_KALLSYMS_ALL is disabled, therefore probe "writeback" is disabled. Rebuild your kernel with this configuration option enabled in order to trace this subsystem.)
+  ifdef CONFIG_LOCALVERSION # Check if dot-config is included.
+    $(warning CONFIG_KALLSYMS_ALL is disabled, therefore probe "writeback" is disabled. Rebuild your kernel with this configuration option enabled in order to trace this subsystem.)
+  endif
 endif # CONFIG_KALLSYMS_ALL
 
 ifneq ($(CONFIG_KPROBES),)
@@ -258,9 +259,22 @@ ifneq ($(CONFIG_KRETPROBES),)
 endif # CONFIG_KRETPROBES
 
 ifneq ($(CONFIG_DYNAMIC_FTRACE),)
-  obj-$(CONFIG_LTTNG) += lttng-ftrace.o
+  ftrace_dep = $(srctree)/kernel/trace/trace.h
+  ftrace_dep_check = $(wildcard $(ftrace_dep))
+  ftrace = $(shell \
+    if [ $(VERSION) -ge 5 -o \( $(VERSION) -eq 4 -a $(PATCHLEVEL) -ge 12 \) ] ; then \
+      if [ -z "$(ftrace_dep_check)" ] ; then \
+        echo "warn" ; \
+        exit ; \
+      fi; \
+    fi; \
+    echo "lttng-ftrace.o" ; \
+    )
+  ifeq ($(ftrace),warn)
+    $(warning Files $(ftrace_dep) not found. Probe "ftrace" is disabled. Use full kernel source tree to enable it.)
+    ftrace =
+  endif # $(ftrace),warn
+  obj-$(CONFIG_LTTNG) += $(ftrace)
 endif # CONFIG_DYNAMIC_FTRACE
 
-obj-$(CONFIG_LTTNG) += lttng-test.o
-
 # vim:syntax=make