[PATCH] ljs: add hacky log output

[Lorenzo Stoakes]

---
 mm/mmap.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mm/mmap.c b/mm/mmap.c
index dd4b35a25aeb..f927744e6384 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1464,9 +1464,17 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
 		 */
 		if (unlikely(vm_flags != vma->vm_flags && vmg.prev)) {
 			vmg.flags = vma->vm_flags;
+
+			pr_err("LJS: HIT CASE [%lx, %lx) orig flags=[%lu] flags=[%lu]\n",
+			       vma->vm_start, vma->vm_end, vm_flags, vma->vm_flags);
+
 			/* If this fails, state is reset ready for a reattempt. */
 			merge = vma_merge_new_range(&vmg);

+			pr_err("LJS: HIT CASE POST MERGE [%lx, %lx) merge=%s\n",
+			       vma->vm_start, vma->vm_end,
+			       merge == NULL ? "false" : "success");
+
 			if (merge) {
 				/*
 				 * ->mmap() can change vma->vm_file and fput
--
2.46.2