gpu: nvgpu: Use config in makefile for debug_kmem.c

Conditionally compile debug_kmem.c in the Makefile since the entire
file is not needed when CONFIG_NVGPU_TRACK_KMEM_USAGE is not enabled.
Removing as many conditional compilation flags from the C code itself
is highly desirable from a code complexity standard.

Change-Id: If1e87986ca1ee6d71485f1ab40f10c1645c1a628
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1576543
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 5 insertions, 3 deletions

diff --git a/drivers/gpu/nvgpu/Makefile.nvgpu b/drivers/gpu/nvgpu/Makefile.nvgpu
index 9ba6f49a..e059002a 100644
--- a/drivers/gpu/nvgpu/Makefile.nvgpu
+++ b/drivers/gpu/nvgpu/Makefile.nvgpu
@@ -137,10 +137,14 @@ nvgpu-$(CONFIG_DEBUG_FS) += \
         common/linux/debug_mm.o \
         common/linux/debug_allocator.o \
         common/linux/debug_hal.o \
-        common/linux/debug_kmem.o \
         common/linux/debug_clk.o \
         common/linux/debug_xve.o
 
+ifeq ($(CONFIG_NVGPU_TRACK_MEM_USAGE),y)
+nvgpu-$(CONFIG_DEBUG_FS) += \
+        common/linux/debug_kmem.o
+endif
+
 nvgpu-$(CONFIG_TEGRA_GK20A) += common/linux/platform_gk20a_tegra.o
 nvgpu-$(CONFIG_SYNC) += gk20a/sync_gk20a.o
 nvgpu-$(CONFIG_GK20A_PCI) += common/linux/pci.o
diff --git a/drivers/gpu/nvgpu/common/linux/debug_kmem.c b/drivers/gpu/nvgpu/common/linux/debug_kmem.c
index 04fb8b68..a0c7d47d 100644
--- a/drivers/gpu/nvgpu/common/linux/debug_kmem.c
+++ b/drivers/gpu/nvgpu/common/linux/debug_kmem.c
@@ -18,7 +18,6 @@
 #include "debug_kmem.h"
 #include "kmem_priv.h"
 
-#ifdef CONFIG_NVGPU_TRACK_MEM_USAGE
 /**
  * to_human_readable_bytes - Determine  suffix for passed size.
  *
@@ -311,4 +310,3 @@ void nvgpu_kmem_debugfs_init(struct gk20a *g)
                                    l->debugfs_kmem,
                                    g, &__kmem_traces_fops);
 }
-#endif