[PATCH v5 18/23] lib/bootconfig: fix signed comparison in xbc_node_get_data()

[Josh Law <objecting@objecting.org>]

  lib/bootconfig.c:188:28: warning: comparison of integer expressions
  of different signedness: 'int' and 'size_t' [-Wsign-compare]

The local variable 'offset' is declared as int, but xbc_data_size is
size_t.  Using ~XBC_VALUE as the mask also involves integer promotion
rules that obscure intent.

Change the type to unsigned int and mask with XBC_DATA_MAX (which is
the 15-bit data mask) instead of ~XBC_VALUE, making the expression
self-documenting and eliminating the signed/unsigned comparison.

Signed-off-by: Josh Law <objecting@objecting.org>
---
 lib/bootconfig.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 182d9d9bc5a6..806a8f038d24 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -183,7 +183,7 @@ struct xbc_node * __init xbc_node_get_next(struct xbc_node *node)
  */
 const char * __init xbc_node_get_data(struct xbc_node *node)
 {
-	int offset = node->data & ~XBC_VALUE;
+	unsigned int offset = node->data & XBC_DATA_MAX;
 
 	if (WARN_ON(offset >= xbc_data_size))
 		return NULL;
-- 
2.34.1