[PATCH] sparse: add built-in byte swap identifiers

[Kim Phillips <kim.phillips@freescale.com>]

this patch stops sparse from complaining about them not being
defined:

include/uapi/linux/swab.h:60:16: error: undefined identifier '__builtin_bswap32'
include/uapi/linux/swab.h:60:33: error: not a function <noident>

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
---
Based on:

git://git.kernel.org/pub/scm/devel/sparse/chrisl/sparse.git

since it's more up-to-date than:

git://git.kernel.org/pub/scm/devel/sparse/sparse.git

which is what's advertised as the main sparse tree, here:

https://sparse.wiki.kernel.org/index.php/Main_Page

 lib.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib.c b/lib.c
index 6bd10d3..4f69e11 100644
--- a/lib.c
+++ b/lib.c
@@ -727,6 +727,11 @@ void declare_builtin_functions(void)
 	add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 	add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 
+	/* And byte swaps.. */
+	add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
+	add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
+	add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
+
 	/* And some random ones.. */
 	add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 	add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
-- 
1.7.9.7