diff options
| author | Frank Rowand <frank.rowand@sony.com> | 2018-10-04 20:32:04 -0700 |
|---|---|---|
| committer | Frank Rowand <frank.rowand@sony.com> | 2018-11-08 22:11:32 -0800 |
| commit | 6f75118800acf77f8ad6afec61ca1b2349ade371 (patch) | |
| tree | c8c46a2f76a8ae4cab60f79ad6575deef7334787 /include/linux/of.h | |
| parent | 81225ea682f45629a66309636482b7c9bc2dcec1 (diff) | |
of: overlay: validate overlay properties #address-cells and #size-cells
If overlay properties #address-cells or #size-cells are already in
the live devicetree for any given node, then the values in the
overlay must match the values in the live tree.
If the properties are already in the live tree then there is no
need to create a changeset entry to add them since they must
have the same value. This reduces the memory used by the
changeset and eliminates a possible memory leak.
Tested-by: Alan Tull <atull@kernel.org>
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Diffstat (limited to 'include/linux/of.h')
| -rw-r--r-- | include/linux/of.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index 664cd5573ae2..18ac8921e90c 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -990,6 +990,12 @@ static inline int of_map_rid(struct device_node *np, u32 rid, #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) #endif +static inline int of_prop_val_eq(struct property *p1, struct property *p2) +{ + return p1->length == p2->length && + !memcmp(p1->value, p2->value, (size_t)p1->length); +} + #if defined(CONFIG_OF) && defined(CONFIG_NUMA) extern int of_node_to_nid(struct device_node *np); #else |