Remove incorrect __restrict qualifier on several pointers

The typical case was:
static __inline int
convert_ccl(FILE *fp, char * __restrict p, [...])
{
        [...]

        if (p == SUPPRESS_PTR) {
		[...]
	} else {
		[...]
	}

	[...]
}

This qualifier says that the pointer is the only one at that time
pointing to the resource.

Here, clang considers that "p" will never match "SUPPRESS_PTR" and
optimize the if{} block out. This leads to segfaults in programs calling
vfscanf(3) and vfwscanf(3) with just the format string (no arguments
following it).

The following softwares were reported to abort with segmentation fault
and this patch fixes it:
    o  cmake
    o  smartd
    o  devel/ORBit2

dim@ opened an LLVM PR to discuss this clang optimization:
    http://llvm.org/bugs/show_bug.cgi?id=12656

Tested by:	bsam@

2 files changed, 9 insertions, 9 deletions

diff --git a/lib/libc/stdio/vfscanf.c b/lib/libc/stdio/vfscanf.c
index 4fe40e3..8f9d3d0 100644
--- a/lib/libc/stdio/vfscanf.c
+++ b/lib/libc/stdio/vfscanf.c
@@ -125,7 +125,7 @@ static const mbstate_t initial_mbs;
  */
 
 static __inline int
-convert_char(FILE *fp, char * __restrict p, int width)
+convert_char(FILE *fp, char * p, int width)
 {
 	int n;
 
@@ -151,7 +151,7 @@ convert_char(FILE *fp, char * __restrict p, int width)
 		return (sum);
 	} else {
 		size_t r = __fread(p, 1, width, fp);
-		
+
 		if (r == 0)
 			return (-1);
 		return (r);
@@ -179,7 +179,7 @@ convert_wchar(FILE *fp, wchar_t *wcp, int width, locale_t locale)
 }
 
 static __inline int
-convert_ccl(FILE *fp, char * __restrict p, int width, const char *ccltab)
+convert_ccl(FILE *fp, char * p, int width, const char *ccltab)
 {
 	char *p0;
 	int n;
@@ -249,7 +249,7 @@ convert_wccl(FILE *fp, wchar_t *wcp, int width, const char *ccltab,
 }
 
 static __inline int
-convert_string(FILE *fp, char * __restrict p, int width)
+convert_string(FILE *fp, char * p, int width)
 {
 	char *p0;
 	int n;
@@ -387,7 +387,7 @@ parseint(FILE *fp, char * __restrict buf, int width, int base, int flags)
 				goto ok;
 			}
 			break;
-					
+
 		/*
 		 * x ok iff flag still set & 2nd char (or 3rd char if
 		 * we have a sign).
diff --git a/lib/libc/stdio/vfwscanf.c b/lib/libc/stdio/vfwscanf.c
index c542084..28e2c03 100644
--- a/lib/libc/stdio/vfwscanf.c
+++ b/lib/libc/stdio/vfwscanf.c
@@ -138,7 +138,7 @@ static const mbstate_t initial_mbs;
  */
 
 static __inline int
-convert_char(FILE *fp, char * __restrict mbp, int width, locale_t locale)
+convert_char(FILE *fp, char * mbp, int width, locale_t locale)
 {
 	mbstate_t mbs;
 	size_t nconv;
@@ -179,7 +179,7 @@ convert_wchar(FILE *fp, wchar_t *wcp, int width, locale_t locale)
 }
 
 static __inline int
-convert_ccl(FILE *fp, char * __restrict mbp, int width, const struct ccl *ccl,
+convert_ccl(FILE *fp, char * mbp, int width, const struct ccl *ccl,
     locale_t locale)
 {
 	mbstate_t mbs;
@@ -237,7 +237,7 @@ convert_wccl(FILE *fp, wchar_t *wcp, int width, const struct ccl *ccl,
 }
 
 static __inline int
-convert_string(FILE *fp, char * __restrict mbp, int width, locale_t locale)
+convert_string(FILE *fp, char * mbp, int width, locale_t locale)
 {
 	mbstate_t mbs;
 	size_t nconv;
@@ -372,7 +372,7 @@ parseint(FILE *fp, wchar_t *buf, int width, int base, int flags,
 				goto ok;
 			}
 			break;
-					
+
 		/*
 		 * x ok iff flag still set & 2nd char (or 3rd char if
 		 * we have a sign).