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-rw-r--r--scripts/coccinelle/api/vma_pages.cocci61
1 files changed, 61 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/vma_pages.cocci b/scripts/coccinelle/api/vma_pages.cocci
new file mode 100644
index 000000000..10511b9bf
--- /dev/null
+++ b/scripts/coccinelle/api/vma_pages.cocci
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+///
+/// Use vma_pages function on vma object instead of explicit computation.
+///
+// Confidence: High
+// Keywords: vma_pages vma
+// Comment: Based on resource_size.cocci
+
+virtual context
+virtual patch
+virtual org
+virtual report
+
+//----------------------------------------------------------
+// For context mode
+//----------------------------------------------------------
+
+@r_context depends on context && !patch && !org && !report@
+struct vm_area_struct *vma;
+@@
+
+* (vma->vm_end - vma->vm_start) >> PAGE_SHIFT
+
+//----------------------------------------------------------
+// For patch mode
+//----------------------------------------------------------
+
+@r_patch depends on !context && patch && !org && !report@
+struct vm_area_struct *vma;
+@@
+
+- ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT)
++ vma_pages(vma)
+
+//----------------------------------------------------------
+// For org mode
+//----------------------------------------------------------
+
+@r_org depends on !context && !patch && (org || report)@
+struct vm_area_struct *vma;
+position p;
+@@
+
+ (vma->vm_end@p - vma->vm_start) >> PAGE_SHIFT
+
+@script:python depends on report@
+p << r_org.p;
+x << r_org.vma;
+@@
+
+msg="WARNING: Consider using vma_pages helper on %s" % (x)
+coccilib.report.print_report(p[0], msg)
+
+@script:python depends on org@
+p << r_org.p;
+x << r_org.vma;
+@@
+
+msg="WARNING: Consider using vma_pages helper on %s" % (x)
+msg_safe=msg.replace("[","@(").replace("]",")")
+coccilib.org.print_todo(p[0], msg_safe)