Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
backport/backport-include/linux/mm.h | 35 ++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/backport/backport-include/linux/mm.h b/backport/backport-include/linux/mm.h
index 3234b37d..6ee5c7d8 100644
--- a/backport/backport-include/linux/mm.h
+++ b/backport/backport-include/linux/mm.h
@@ -3,6 +3,9 @@
#include_next <linux/mm.h>
#include <linux/page_ref.h>
#include <linux/sched.h>
+#include <linux/overflow.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
#ifndef VM_NODUMP
/*
@@ -123,4 +126,36 @@ static inline bool page_is_pfmemalloc(struct page *page)
}
#endif /* < 4.2 */
+#if LINUX_VERSION_IS_LESS(4,12,0)
+#define kvmalloc LINUX_BACKPORT(kvmalloc)
+static inline void *kvmalloc(size_t size, gfp_t flags)
+{
+ gfp_t kmalloc_flags = flags;
+ void *ret;
+
+ if ((flags & GFP_KERNEL) != GFP_KERNEL)
+ return kmalloc(size, flags);
+
+ if (size > PAGE_SIZE)
+ kmalloc_flags |= __GFP_NOWARN | __GFP_NORETRY;
+
+ ret = kmalloc(size, flags);
+ if (ret || size < PAGE_SIZE)
+ return ret;
+
+ return vmalloc(size);
+}
+
+#define kvmalloc_array LINUX_BACKPORT(kvmalloc_array)
+static inline void *kvmalloc_array(size_t n, size_t size, gfp_t flags)
+{
+ size_t bytes;
+
+ if (unlikely(check_mul_overflow(n, size, &bytes)))
+ return NULL;
+
+ return kvmalloc(bytes, flags);
+}
+#endif
+
#endif /* __BACKPORT_MM_H */
--
2.17.0
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