gpu: nvgpu: fix issue with CONFIG_DEBUG_FS=n

following compilation error are reported with CONFIG_DEBUG_FS=n:

pci.c:246:7: error: 'struct mm_gk20a' has no member named 'ltc_enabled'
pci.c:247:7: error: 'struct mm_gk20a' has no member named 'ltc_enabled_debug'
possible compilation error(reported sometime):
gk20a_allocator.c:1163:13: error: 'gk20a_alloc_debugfs_init' defined
but not used
fixed by adding '#ifdef CONFIG_DEBUG_FS' for debug only code.

following variables from gk20a.c are not initialized from
CONFIG_DEBUG_FS=n path, it will cause kernel oops when booting:

	gk20a->mm.bypass_smmu = platform->bypass_smmu;
	gk20a->mm.disable_bigpage = platform->disable_bigpage;
	gk20a->mm.has_physical_mode = true;
fix it by move them out from '#ifdef CONFIG_DEBUG_FS' section.

Bug 1778001

Change-Id: Ic2da36b3f500882748ee46a5150903244b697761
Signed-off-by: David Pu <dpu@nvidia.com>
Reviewed-on: http://git-master/r/1167358
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/pci.c b/drivers/gpu/nvgpu/pci.c
index a899c0cf..01c7a2dc 100644
--- a/drivers/gpu/nvgpu/pci.c
+++ b/drivers/gpu/nvgpu/pci.c
@@ -243,8 +243,10 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
 
         g->mm.has_physical_mode = false;
         g->mm.vidmem_is_vidmem = true;
+#ifdef CONFIG_DEBUG_FS
         g->mm.ltc_enabled = true;
         g->mm.ltc_enabled_debug = true;
+#endif
         g->mm.bypass_smmu = platform->bypass_smmu;
         g->mm.disable_bigpage = platform->disable_bigpage;