[PATCH v2] symbol: preserve address space qualifiers with typeof()

When we're parsing typeof(var) we then preserve the address space
qualifiers as well.  Otherwise it leads to warnings like this:

"warning: cast removes address space '__seg_gs' of expression"

Reported-by: Uros Bizjak <[email protected]>
Signed-off-by: Dan Carpenter <[email protected]>
---
v2: Fix a NULL dereference because "base" can be NULL.  Sorry for not
running the validation/ tests...  :(

 symbol.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/symbol.c b/symbol.c
index 7060acb666d9..a42289226650 100644
--- a/symbol.c
+++ b/symbol.c
@@ -544,9 +544,12 @@ static struct symbol *examine_pointer_type(struct symbol *sym)
 static struct symbol *examine_typeof_helper(struct symbol *sym, bool qual)
 {
 	struct symbol *base = evaluate_expression(sym->initializer);
+	struct ident *as = NULL;
 	unsigned long mod = 0;
 
-	if (!base)
+	if (base)
+		as = base->ctype.as;
+	else
 		base = &bad_ctype;
 	if (base->type == SYM_NODE) {
 		mod |= base->ctype.modifiers & MOD_TYPEOF;
@@ -559,6 +562,8 @@ static struct symbol *examine_typeof_helper(struct symbol *sym, bool qual)
 	sym->type = SYM_NODE;
 	sym->ctype.modifiers = mod;
 	sym->ctype.base_type = base;
+	if (qual)
+		sym->ctype.as = as;
 	return examine_node_type(sym);
 }
 
-- 
2.51.0