Merge tag 'nfsd-5.3-1' of git://linux-nfs.org/~bfields/linux

[sfrench/cifs-2.6.git] / include / linux / filter.h

diff --git a/include/linux/filter.h b/include/linux/filter.h
index ff65d22cf336935c9406930496dc8a8f57a0cbd0..92c6e31fb008ee80073e310797e27d0e72d428c2 100644 (file)
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -24,6 +24,7 @@
 
 #include <net/sch_generic.h>
 
+#include <asm/byteorder.h>
 #include <uapi/linux/filter.h>
 #include <uapi/linux/bpf.h>
 
@@ -747,6 +748,18 @@ bpf_ctx_narrow_access_ok(u32 off, u32 size, u32 size_default)
        return size <= size_default && (size & (size - 1)) == 0;
 }
 
+static inline u8
+bpf_ctx_narrow_load_shift(u32 off, u32 size, u32 size_default)
+{
+       u8 load_off = off & (size_default - 1);
+
+#ifdef __LITTLE_ENDIAN
+       return load_off * 8;
+#else
+       return (size_default - (load_off + size)) * 8;
+#endif
+}
+
 #define bpf_ctx_wide_access_ok(off, size, type, field)                 \
        (size == sizeof(__u64) &&                                       \
        off >= offsetof(type, field) &&                                 \