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authorArnd Bergmann <arnd@arndb.de>2018-01-16 19:34:00 +0300
committerDavid S. Miller <davem@davemloft.net>2018-01-19 22:02:12 +0300
commitce6289661b14a8b391d90db918c91b6d6da6540a (patch)
tree73dc6d7aad08f3f6cd0328641e870ff9e71e7025 /include/net/caif
parentaa73dc95b2de107b88df5871c7f483446507330f (diff)
downloadlinux-ce6289661b14a8b391d90db918c91b6d6da6540a.tar.xz
caif: reduce stack size with KASAN
When CONFIG_KASAN is set, we can use relatively large amounts of kernel stack space: net/caif/cfctrl.c:555:1: warning: the frame size of 1600 bytes is larger than 1280 bytes [-Wframe-larger-than=] This adds convenience wrappers around cfpkt_extr_head(), which is responsible for most of the stack growth. With those wrapper functions, gcc apparently starts reusing the stack slots for each instance, thus avoiding the problem. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/caif')
-rw-r--r--include/net/caif/cfpkt.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/net/caif/cfpkt.h b/include/net/caif/cfpkt.h
index fe328c52c46b..801489bb14c3 100644
--- a/include/net/caif/cfpkt.h
+++ b/include/net/caif/cfpkt.h
@@ -32,6 +32,33 @@ void cfpkt_destroy(struct cfpkt *pkt);
*/
int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len);
+static inline u8 cfpkt_extr_head_u8(struct cfpkt *pkt)
+{
+ u8 tmp;
+
+ cfpkt_extr_head(pkt, &tmp, 1);
+
+ return tmp;
+}
+
+static inline u16 cfpkt_extr_head_u16(struct cfpkt *pkt)
+{
+ __le16 tmp;
+
+ cfpkt_extr_head(pkt, &tmp, 2);
+
+ return le16_to_cpu(tmp);
+}
+
+static inline u32 cfpkt_extr_head_u32(struct cfpkt *pkt)
+{
+ __le32 tmp;
+
+ cfpkt_extr_head(pkt, &tmp, 4);
+
+ return le32_to_cpu(tmp);
+}
+
/*
* Peek header from packet.
* Reads data from packet without changing packet.