mm/debug: Add VM_BUG_ON_FOLIO() and VM_WARN_ON_ONCE_FOLIO()

These are the folio equivalents of VM_BUG_ON_PAGE and
VM_WARN_ON_ONCE_PAGE.  No change to generated code.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>

diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
index 1935d4c72d1042bd9e718d7d44c7123da08d7caf..d7285f8148a3b0cdd9c1b0cb327a7ce9e480d445 100644 (file)
--- a/include/linux/mmdebug.h
+++ b/include/linux/mmdebug.h
@@ -22,6 +22,13 @@ void dump_mm(const struct mm_struct *mm);
                        BUG();                                          \
                }                                                       \
        } while (0)
+#define VM_BUG_ON_FOLIO(cond, folio)                                   \
+       do {                                                            \
+               if (unlikely(cond)) {                                   \
+                       dump_page(&folio->page, "VM_BUG_ON_FOLIO(" __stringify(cond)")");\
+                       BUG();                                          \
+               }                                                       \
+       } while (0)
 #define VM_BUG_ON_VMA(cond, vma)                                       \
        do {                                                            \
                if (unlikely(cond)) {                                   \
@@ -47,6 +54,17 @@ void dump_mm(const struct mm_struct *mm);
        }                                                               \
        unlikely(__ret_warn_once);                                      \
 })
+#define VM_WARN_ON_ONCE_FOLIO(cond, folio)     ({                      \
+       static bool __section(".data.once") __warned;                   \
+       int __ret_warn_once = !!(cond);                                 \
+                                                                       \
+       if (unlikely(__ret_warn_once && !__warned)) {                   \
+               dump_page(&folio->page, "VM_WARN_ON_ONCE_FOLIO(" __stringify(cond)")");\
+               __warned = true;                                        \
+               WARN_ON(1);                                             \
+       }                                                               \
+       unlikely(__ret_warn_once);                                      \
+})
 
 #define VM_WARN_ON(cond) (void)WARN_ON(cond)
 #define VM_WARN_ON_ONCE(cond) (void)WARN_ON_ONCE(cond)
@@ -55,11 +73,13 @@ void dump_mm(const struct mm_struct *mm);
 #else
 #define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
 #define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
+#define VM_BUG_ON_FOLIO(cond, folio) VM_BUG_ON(cond)
 #define VM_BUG_ON_VMA(cond, vma) VM_BUG_ON(cond)
 #define VM_BUG_ON_MM(cond, mm) VM_BUG_ON(cond)
 #define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN_ON_ONCE_PAGE(cond, page)  BUILD_BUG_ON_INVALID(cond)
+#define VM_WARN_ON_ONCE_FOLIO(cond, folio)  BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
 #define VM_WARN(cond, format...) BUILD_BUG_ON_INVALID(cond)
 #endif