Attachment 236388 Details for Bug 266227 – Patch to modify qsort_r API to use GNU (POSIX) interface

[patch] Patch to modify qsort_r API to use GNU (POSIX) interface

0001-Alter-the-prototype-of-qsort_r-3-to-match-glibc.patch (text/plain), 19.08 KB, created by Xin LI on 2022-09-06 06:15:16 UTC

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Creator: Xin LI

Created: 2022-09-06 06:15:16 UTC

Size: 19.08 KB

patch

obsolete

>From 2eb9c4573f423998247a005938a21a09d2ab8aed Mon Sep 17 00:00:00 2001
>From: Ed Schouten <ed@FreeBSD.org>
>Date: Sun, 4 Sep 2022 18:48:54 -0700
>Subject: [PATCH] Alter the prototype of qsort_r(3) to match glibc.
>
>The Austin Group is considering standardizing qsort_r(3) for the
>upcoming revision of the standard. Unfortunately, Linux/glibc-based
>systems provide a copy of this function that has a different prototype
>than ours. Let's switch over to the same prototype that they are using.
>There is no need to remain incompatible. Symbol versioning is used to
>keep old binaries working.
>
>MFC:			never
>Relnotes:		yes
>Differential revision:	https://reviews.freebsd.org/D17083
>---
> include/stdlib.h                              | 17 +++++++++++++--
> lib/libc/gen/scandir-compat11.c               |  8 +++----
> lib/libc/gen/scandir.c                        |  6 +++---
> lib/libc/stdlib/Makefile.inc                  |  4 ++--
> lib/libc/stdlib/Symbol.map                    |  2 +-
> lib/libc/stdlib/qsort.3                       | 12 ++++++++---
> lib/libc/stdlib/qsort.c                       | 16 ++++++++++++--
> lib/libc/stdlib/qsort_r.c                     | 11 ----------
> lib/libc/stdlib/qsort_r_compat.c              | 21 +++++++++++++++++++
> lib/libc/tests/stdlib/qsort_r_test.c          |  6 +++---
> lib/libproc/proc_sym.c                        |  4 ++--
> sys/compat/linuxkpi/common/src/linux_compat.c |  4 ++--
> sys/dev/bhnd/nvram/bhnd_nvram_store_subr.c    |  9 ++++----
> sys/dev/drm2/drm_linux_list_sort.c            |  4 ++--
> sys/libkern/qsort.c                           | 10 ++++-----
> sys/netgraph/ng_ppp.c                         |  8 +++----
> sys/sys/libkern.h                             |  4 ++--
> 17 files changed, 93 insertions(+), 53 deletions(-)
> create mode 100644 lib/libc/stdlib/qsort_r_compat.c
>
>diff --git a/include/stdlib.h b/include/stdlib.h
>index bf1a612190ee..dd0d9a4f3e6c 100644
>--- a/include/stdlib.h
>+++ b/include/stdlib.h
>@@ -311,8 +311,8 @@ int	 mergesort_b(void *, size_t, size_t, int (^)(const void *, const void *));
> int	 mkostemp(char *, int);
> int	 mkostemps(char *, int, int);
> int	 mkostempsat(int, char *, int, int);
>-void	 qsort_r(void *, size_t, size_t, void *,
>-	    int (*)(void *, const void *, const void *));
>+void	 qsort_r(void *, size_t, size_t,
>+	    int (*)(const void *, const void *, void *), void *);
> int	 radixsort(const unsigned char **, int, const unsigned char *,
> 	    unsigned);
> void	*reallocarray(void *, size_t, size_t) __result_use_check
>@@ -332,6 +332,19 @@ __int64_t
> __uint64_t
> 	 strtouq(const char *, char **, int);
> 
>+/*
>+ * Attempt to trap calls of the historical qsort_r() function. The order
>+ * of the last two arguments of this function have changed. If the last
>+ * argument matches the type of the traditional comparator function,
>+ * call an integer instead, which will generate a compiler error.
>+ */
>+#if defined(__generic) && !defined(__cplusplus)
>+extern int __calling_qsort_r_incorrectly;
>+#define	qsort_r(base, nel, width, compar, arg)				\
>+    __generic(arg, int (*)(void *, const void *, const void *),		\
>+        __calling_qsort_r_incorrectly, qsort_r)(base, nel, width, compar, arg)
>+#endif
>+
> extern char *suboptarg;			/* getsubopt(3) external variable */
> #endif /* __BSD_VISIBLE */
> 
>diff --git a/lib/libc/gen/scandir-compat11.c b/lib/libc/gen/scandir-compat11.c
>index 2c86b548f1d9..5ca92bdefeb0 100644
>--- a/lib/libc/gen/scandir-compat11.c
>+++ b/lib/libc/gen/scandir-compat11.c
>@@ -58,8 +58,8 @@ __FBSDID("$FreeBSD$");
> 
> #define	SELECT(x)	select(x)
> 
>-static int freebsd11_alphasort_thunk(void *thunk, const void *p1,
>-    const void *p2);
>+static int freebsd11_alphasort_thunk(const void *p1, const void *p2,
>+    void *thunk);
> 
> int
> freebsd11_scandir(const char *dirname, struct freebsd11_dirent ***namelist,
>@@ -116,7 +116,7 @@ freebsd11_scandir(const char *dirname, struct freebsd11_dirent ***namelist,
> 	closedir(dirp);
> 	if (numitems && dcomp != NULL)
> 		qsort_r(names, numitems, sizeof(struct freebsd11_dirent *),
>-		    &dcomp, freebsd11_alphasort_thunk);
>+		    freebsd11_alphasort_thunk, &dcomp);
> 	*namelist = names;
> 	return (numitems);
> 
>@@ -141,7 +141,7 @@ freebsd11_alphasort(const struct freebsd11_dirent **d1,
> }
> 
> static int
>-freebsd11_alphasort_thunk(void *thunk, const void *p1, const void *p2)
>+freebsd11_alphasort_thunk(const void *p1, const void *p2, void *thunk)
> {
> 	int (*dc)(const struct freebsd11_dirent **, const struct
> 	    freebsd11_dirent **);
>diff --git a/lib/libc/gen/scandir.c b/lib/libc/gen/scandir.c
>index 8a260adcd2f3..38a52e83d36f 100644
>--- a/lib/libc/gen/scandir.c
>+++ b/lib/libc/gen/scandir.c
>@@ -63,7 +63,7 @@ typedef DECLARE_BLOCK(int, select_block, const struct dirent *);
> typedef DECLARE_BLOCK(int, dcomp_block, const struct dirent **,
>     const struct dirent **);
> #else
>-static int alphasort_thunk(void *thunk, const void *p1, const void *p2);
>+static int alphasort_thunk(const void *p1, const void *p2, void *thunk);
> #endif
> 
> static int
>@@ -123,7 +123,7 @@ scandir_dirp(DIR *dirp, struct dirent ***namelist,
> 		qsort_b(names, numitems, sizeof(struct dirent *), (void*)dcomp);
> #else
> 		qsort_r(names, numitems, sizeof(struct dirent *),
>-		    &dcomp, alphasort_thunk);
>+		    alphasort_thunk, &dcomp);
> #endif
> 	*namelist = names;
> 	return (numitems);
>@@ -199,7 +199,7 @@ versionsort(const struct dirent **d1, const struct dirent **d2)
> }
> 
> static int
>-alphasort_thunk(void *thunk, const void *p1, const void *p2)
>+alphasort_thunk(const void *p1, const void *p2, void *thunk)
> {
> 	int (*dc)(const struct dirent **, const struct dirent **);
> 
>diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc
>index a658fd78e862..8ace2c051b82 100644
>--- a/lib/libc/stdlib/Makefile.inc
>+++ b/lib/libc/stdlib/Makefile.inc
>@@ -11,8 +11,8 @@ MISRCS+=C99_Exit.c a64l.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
> 	getsubopt.c hcreate.c hcreate_r.c hdestroy_r.c heapsort.c heapsort_b.c \
> 	hsearch_r.c imaxabs.c imaxdiv.c \
> 	insque.c l64a.c labs.c ldiv.c llabs.c lldiv.c lsearch.c \
>-	merge.c mergesort_b.c ptsname.c qsort.c qsort_r.c qsort_s.c \
>-	quick_exit.c radixsort.c rand.c \
>+	merge.c mergesort_b.c ptsname.c qsort.c qsort_r.c qsort_r_compat.c \
>+	qsort_s.c quick_exit.c radixsort.c rand.c \
> 	random.c reallocarray.c reallocf.c realpath.c remque.c \
> 	set_constraint_handler_s.c strfmon.c strtoimax.c \
> 	strtol.c strtold.c strtoll.c strtoq.c strtoul.c strtonum.c strtoull.c \
>diff --git a/lib/libc/stdlib/Symbol.map b/lib/libc/stdlib/Symbol.map
>index 6524c6097b96..7e0b141a21b6 100644
>--- a/lib/libc/stdlib/Symbol.map
>+++ b/lib/libc/stdlib/Symbol.map
>@@ -49,7 +49,6 @@ FBSD_1.0 {
> 	lfind;
> 	mergesort;
> 	putenv;
>-	qsort_r;
> 	qsort;
> 	radixsort;
> 	sradixsort;
>@@ -130,6 +129,7 @@ FBSD_1.6 {
> 
> FBSD_1.7 {
> 	clearenv;
>+	qsort_r;
> };
> 
> FBSDprivate_1.0 {
>diff --git a/lib/libc/stdlib/qsort.3 b/lib/libc/stdlib/qsort.3
>index 606185f9baee..cd56fb71ddb7 100644
>--- a/lib/libc/stdlib/qsort.3
>+++ b/lib/libc/stdlib/qsort.3
>@@ -32,7 +32,7 @@
> .\"     @(#)qsort.3	8.1 (Berkeley) 6/4/93
> .\" $FreeBSD$
> .\"
>-.Dd January 20, 2020
>+.Dd September 12, 2022
> .Dt QSORT 3
> .Os
> .Sh NAME
>@@ -67,8 +67,8 @@
> .Fa "void *base"
> .Fa "size_t nmemb"
> .Fa "size_t size"
>+.Fa "int \*[lp]*compar\*[rp]\*[lp]const void *, const void *, void *\*[rp]"
> .Fa "void *thunk"
>-.Fa "int \*[lp]*compar\*[rp]\*[lp]void *, const void *, const void *\*[rp]"
> .Fc
> .Ft int
> .Fo heapsort
>@@ -157,7 +157,7 @@ function behaves identically to
> .Fn qsort ,
> except that it takes an additional argument,
> .Fa thunk ,
>-which is passed unchanged as the first argument to function pointed to
>+which is passed unchanged as the last argument to function pointed to
> .Fa compar .
> This allows the comparison function to access additional
> data without using global variables, and thus
>@@ -436,3 +436,9 @@ K.3.6.3.2.
> The variants of these functions that take blocks as arguments first appeared in
> Mac OS X.
> This implementation was created by David Chisnall.
>+.Pp
>+In
>+.Fx 14.0 ,
>+the prototype of
>+.Fn qsort_r
>+was updated to match glibc.
>diff --git a/lib/libc/stdlib/qsort.c b/lib/libc/stdlib/qsort.c
>index 0b99c04507d3..11a3c5508143 100644
>--- a/lib/libc/stdlib/qsort.c
>+++ b/lib/libc/stdlib/qsort.c
>@@ -42,6 +42,8 @@ __FBSDID("$FreeBSD$");
> #include "libc_private.h"
> 
> #if defined(I_AM_QSORT_R)
>+typedef int		 cmp_t(const void *, const void *, void *);
>+#elif defined(I_AM_QSORT_R_COMPAT)
> typedef int		 cmp_t(void *, const void *, const void *);
> #elif defined(I_AM_QSORT_S)
> typedef int		 cmp_t(const void *, const void *, void *);
>@@ -72,6 +74,8 @@ swapfunc(char *a, char *b, size_t es)
> 	if ((n) > 0) swapfunc(a, b, n)
> 
> #if defined(I_AM_QSORT_R)
>+#define	CMP(t, x, y) (cmp((x), (y), (t)))
>+#elif defined(I_AM_QSORT_R_COMPAT)
> #define	CMP(t, x, y) (cmp((t), (x), (y)))
> #elif defined(I_AM_QSORT_S)
> #define	CMP(t, x, y) (cmp((x), (y), (t)))
>@@ -81,7 +85,7 @@ swapfunc(char *a, char *b, size_t es)
> 
> static inline char *
> med3(char *a, char *b, char *c, cmp_t *cmp, void *thunk
>-#if !defined(I_AM_QSORT_R) && !defined(I_AM_QSORT_S)
>+#if !defined(I_AM_QSORT_R) && !defined(I_AM_QSORT_R_COMPAT) && !defined(I_AM_QSORT_S)
> __unused
> #endif
> )
>@@ -97,6 +101,8 @@ __unused
>  */
> #if defined(I_AM_QSORT_R)
> #define local_qsort local_qsort_r
>+#elif defined(I_AM_QSORT_R_COMPAT)
>+#define local_qsort local_qsort_r_compat
> #elif defined(I_AM_QSORT_S)
> #define local_qsort local_qsort_s
> #endif
>@@ -211,10 +217,16 @@ local_qsort(void *a, size_t n, size_t es, cmp_t *cmp, void *thunk)
> 
> #if defined(I_AM_QSORT_R)
> void
>-qsort_r(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
>+(qsort_r)(void *a, size_t n, size_t es, cmp_t *cmp, void *thunk)
> {
> 	local_qsort_r(a, n, es, cmp, thunk);
> }
>+#elif defined(I_AM_QSORT_R_COMPAT)
>+void
>+__qsort_r_compat(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
>+{
>+	local_qsort_r_compat(a, n, es, cmp, thunk);
>+}
> #elif defined(I_AM_QSORT_S)
> errno_t
> qsort_s(void *a, rsize_t n, rsize_t es, cmp_t *cmp, void *thunk)
>diff --git a/lib/libc/stdlib/qsort_r.c b/lib/libc/stdlib/qsort_r.c
>index f489d31c2335..d86873604f59 100644
>--- a/lib/libc/stdlib/qsort_r.c
>+++ b/lib/libc/stdlib/qsort_r.c
>@@ -4,16 +4,5 @@
>  *
>  * $FreeBSD$
>  */
>-#include "block_abi.h"
> #define I_AM_QSORT_R
> #include "qsort.c"
>-
>-typedef DECLARE_BLOCK(int, qsort_block, const void *, const void *);
>-
>-void
>-qsort_b(void *base, size_t nel, size_t width, qsort_block compar)
>-{
>-	qsort_r(base, nel, width, compar,
>-		(int (*)(void *, const void *, const void *))
>-		GET_BLOCK_FUNCTION(compar));
>-}
>diff --git a/lib/libc/stdlib/qsort_r_compat.c b/lib/libc/stdlib/qsort_r_compat.c
>new file mode 100644
>index 000000000000..239a5f307ceb
>--- /dev/null
>+++ b/lib/libc/stdlib/qsort_r_compat.c
>@@ -0,0 +1,21 @@
>+/*
>+ * This file is in the public domain.  Originally written by Garrett
>+ * A. Wollman.
>+ *
>+ * $FreeBSD$
>+ */
>+#include "block_abi.h"
>+#define I_AM_QSORT_R_COMPAT
>+#include "qsort.c"
>+
>+typedef DECLARE_BLOCK(int, qsort_block, const void *, const void *);
>+
>+void
>+qsort_b(void *base, size_t nel, size_t width, qsort_block compar)
>+{
>+	__qsort_r_compat(base, nel, width, compar,
>+		(int (*)(void *, const void *, const void *))
>+		GET_BLOCK_FUNCTION(compar));
>+}
>+
>+__sym_compat(qsort_r, __qsort_r_compat, FBSD_1.0);
>diff --git a/lib/libc/tests/stdlib/qsort_r_test.c b/lib/libc/tests/stdlib/qsort_r_test.c
>index c27e6d92d587..c55563eaea8a 100644
>--- a/lib/libc/tests/stdlib/qsort_r_test.c
>+++ b/lib/libc/tests/stdlib/qsort_r_test.c
>@@ -40,7 +40,7 @@ __FBSDID("$FreeBSD$");
> #define	THUNK 42
> 
> static int
>-sorthelp_r(void *thunk, const void *a, const void *b)
>+sorthelp_r(const void *a, const void *b, void *thunk)
> {
> 	const int *oa, *ob;
> 
>@@ -70,8 +70,8 @@ ATF_TC_BODY(qsort_r_test, tc)
> 			testvector[i] = sresvector[i] = initvector[i];
> 
> 		/* Sort using qsort_r(3) */
>-		qsort_r(testvector, j, sizeof(testvector[0]), &thunk,
>-		    sorthelp_r);
>+		qsort_r(testvector, j, sizeof(testvector[0]), sorthelp_r,
>+		    &thunk);
> 		/* Sort using reference slow sorting routine */
> 		ssort(sresvector, j);
> 
>diff --git a/lib/libproc/proc_sym.c b/lib/libproc/proc_sym.c
>index 27b0fc15a2ab..fdcf133d8457 100644
>--- a/lib/libproc/proc_sym.c
>+++ b/lib/libproc/proc_sym.c
>@@ -105,7 +105,7 @@ struct symsort_thunk {
> };
> 
> static int
>-symvalcmp(void *_thunk, const void *a1, const void *a2)
>+symvalcmp(const void *a1, const void *a2, void *_thunk)
> {
> 	GElf_Sym sym1, sym2;
> 	struct symsort_thunk *thunk;
>@@ -192,7 +192,7 @@ load_symtab(Elf *e, struct symtab *symtab, u_long sh_type)
> 
> 	thunk.e = e;
> 	thunk.symtab = symtab;
>-	qsort_r(symtab->index, nsyms, sizeof(u_int), &thunk, symvalcmp);
>+	qsort_r(symtab->index, nsyms, sizeof(u_int), symvalcmp, &thunk);
> 
> 	return (0);
> }
>diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c
>index 89d2728ce28e..bf370236dd59 100644
>--- a/sys/compat/linuxkpi/common/src/linux_compat.c
>+++ b/sys/compat/linuxkpi/common/src/linux_compat.c
>@@ -2562,7 +2562,7 @@ struct list_sort_thunk {
> };
> 
> static inline int
>-linux_le_cmp(void *priv, const void *d1, const void *d2)
>+linux_le_cmp(const void *d1, const void *d2, void *priv)
> {
> 	struct list_head *le1, *le2;
> 	struct list_sort_thunk *thunk;
>@@ -2590,7 +2590,7 @@ list_sort(void *priv, struct list_head *head, int (*cmp)(void *priv,
> 		ar[i++] = le;
> 	thunk.cmp = cmp;
> 	thunk.priv = priv;
>-	qsort_r(ar, count, sizeof(struct list_head *), &thunk, linux_le_cmp);
>+	qsort_r(ar, count, sizeof(struct list_head *), linux_le_cmp, &thunk);
> 	INIT_LIST_HEAD(head);
> 	for (i = 0; i < count; i++)
> 		list_add_tail(ar[i], head);
>diff --git a/sys/dev/bhnd/nvram/bhnd_nvram_store_subr.c b/sys/dev/bhnd/nvram/bhnd_nvram_store_subr.c
>index 730b9d51da45..fd05648147f5 100644
>--- a/sys/dev/bhnd/nvram/bhnd_nvram_store_subr.c
>+++ b/sys/dev/bhnd/nvram/bhnd_nvram_store_subr.c
>@@ -59,8 +59,7 @@ __FBSDID("$FreeBSD$");
> 
> #include "bhnd_nvram_storevar.h"
> 
>-static int			 bhnd_nvstore_idx_cmp(void *ctx,
>-				     const void *lhs, const void *rhs);
>+static int bhnd_nvstore_idx_cmp(const void *lhs, const void *rhs, void *ctx);
> 
> /**
>  * Allocate and initialize a new path instance.
>@@ -198,7 +197,7 @@ bhnd_nvstore_index_append(struct bhnd_nvram_store *sc,
> 
> /* sort function for bhnd_nvstore_index_prepare() */
> static int
>-bhnd_nvstore_idx_cmp(void *ctx, const void *lhs, const void *rhs)
>+bhnd_nvstore_idx_cmp(const void *lhs, const void *rhs, void *ctx)
> {
> 	struct bhnd_nvram_store	*sc;
> 	void			*l_cookiep, *r_cookiep;
>@@ -259,8 +258,8 @@ bhnd_nvstore_index_prepare(struct bhnd_nvram_store *sc,
> 	BHND_NVSTORE_LOCK_ASSERT(sc, MA_OWNED);
> 
> 	/* Sort the index table */
>-	qsort_r(index->cookiep, index->count, sizeof(index->cookiep[0]), sc,
>-	    bhnd_nvstore_idx_cmp);
>+	qsort_r(index->cookiep, index->count, sizeof(index->cookiep[0]),
>+	    bhnd_nvstore_idx_cmp, sc);
> 
> 	return (0);
> }
>diff --git a/sys/dev/drm2/drm_linux_list_sort.c b/sys/dev/drm2/drm_linux_list_sort.c
>index f9a64154c796..04cdf28180c8 100644
>--- a/sys/dev/drm2/drm_linux_list_sort.c
>+++ b/sys/dev/drm2/drm_linux_list_sort.c
>@@ -37,7 +37,7 @@ struct drm_list_sort_thunk {
> };
> 
> static int
>-drm_le_cmp(void *priv, const void *d1, const void *d2)
>+drm_le_cmp(const void *d1, const void *d2, void *priv)
> {
> 	struct list_head *le1, *le2;
> 	struct drm_list_sort_thunk *thunk;
>@@ -68,7 +68,7 @@ drm_list_sort(void *priv, struct list_head *head, int (*cmp)(void *priv,
> 		ar[i++] = le;
> 	thunk.cmp = cmp;
> 	thunk.priv = priv;
>-	qsort_r(ar, count, sizeof(struct list_head *), &thunk, drm_le_cmp);
>+	qsort_r(ar, count, sizeof(struct list_head *), drm_le_cmp, &thunk);
> 	INIT_LIST_HEAD(head);
> 	for (i = 0; i < count; i++)
> 		list_add_tail(ar[i], head);
>diff --git a/sys/libkern/qsort.c b/sys/libkern/qsort.c
>index 7602127a59d6..66ca826e265c 100644
>--- a/sys/libkern/qsort.c
>+++ b/sys/libkern/qsort.c
>@@ -36,7 +36,7 @@ __FBSDID("$FreeBSD$");
> #include <sys/libkern.h>
> 
> #ifdef I_AM_QSORT_R
>-typedef int		 cmp_t(void *, const void *, const void *);
>+typedef int		 cmp_t(const void *, const void *, void *);
> #else
> typedef int		 cmp_t(const void *, const void *);
> #endif
>@@ -88,7 +88,7 @@ swapfunc(char *a, char *b, size_t n, int swaptype_long, int swaptype_int)
> 	if ((n) > 0) swapfunc(a, b, n, swaptype_long, swaptype_int)
> 
> #ifdef I_AM_QSORT_R
>-#define	CMP(t, x, y) (cmp((t), (x), (y)))
>+#define	CMP(t, x, y) (cmp((x), (y), (t)))
> #else
> #define	CMP(t, x, y) (cmp((x), (y)))
> #endif
>@@ -107,7 +107,7 @@ __unused
> 
> #ifdef I_AM_QSORT_R
> void
>-qsort_r(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
>+(qsort_r)(void *a, size_t n, size_t es, cmp_t *cmp, void *thunk)
> #else
> #define	thunk NULL
> void
>@@ -192,7 +192,7 @@ loop:	SWAPINIT(long, a, es);
> 		/* Recurse on left partition, then iterate on right partition */
> 		if (d1 > es) {
> #ifdef I_AM_QSORT_R
>-			qsort_r(a, d1 / es, es, thunk, cmp);
>+			qsort_r(a, d1 / es, es, cmp, thunk);
> #else
> 			qsort(a, d1 / es, es, cmp);
> #endif
>@@ -208,7 +208,7 @@ loop:	SWAPINIT(long, a, es);
> 		/* Recurse on right partition, then iterate on left partition */
> 		if (d2 > es) {
> #ifdef I_AM_QSORT_R
>-			qsort_r(pn - d2, d2 / es, es, thunk, cmp);
>+			qsort_r(pn - d2, d2 / es, es, cmp, thunk);
> #else
> 			qsort(pn - d2, d2 / es, es, cmp);
> #endif
>diff --git a/sys/netgraph/ng_ppp.c b/sys/netgraph/ng_ppp.c
>index 6c61bcda0ae3..aafed858a26b 100644
>--- a/sys/netgraph/ng_ppp.c
>+++ b/sys/netgraph/ng_ppp.c
>@@ -322,7 +322,7 @@ static void	ng_ppp_frag_timeout(node_p node, hook_p hook, void *arg1,
> static void	ng_ppp_frag_checkstale(node_p node);
> static void	ng_ppp_frag_reset(node_p node);
> static void	ng_ppp_mp_strategy(node_p node, int len, int *distrib);
>-static int	ng_ppp_intcmp(void *latency, const void *v1, const void *v2);
>+static int	ng_ppp_intcmp(const void *v1, const void *v2, void *latency);
> static struct mbuf *ng_ppp_addproto(struct mbuf *m, uint16_t proto, int compOK);
> static struct mbuf *ng_ppp_cutproto(struct mbuf *m, uint16_t *proto);
> static struct mbuf *ng_ppp_prepend(struct mbuf *m, const void *buf, int len);
>@@ -2316,8 +2316,8 @@ ng_ppp_mp_strategy(node_p node, int len, int *distrib)
> 	}
> 
> 	/* Sort active links by latency */
>-	qsort_r(sortByLatency,
>-	    priv->numActiveLinks, sizeof(*sortByLatency), latency, ng_ppp_intcmp);
>+	qsort_r(sortByLatency, priv->numActiveLinks, sizeof(*sortByLatency),
>+	    ng_ppp_intcmp, latency);
> 
> 	/* Find the interval we need (add links in sortByLatency[] order) */
> 	for (numFragments = 1;
>@@ -2401,7 +2401,7 @@ ng_ppp_mp_strategy(node_p node, int len, int *distrib)
>  * Compare two integers
>  */
> static int
>-ng_ppp_intcmp(void *latency, const void *v1, const void *v2)
>+ng_ppp_intcmp(const void *v1, const void *v2, void *latency)
> {
> 	const int index1 = *((const int *) v1);
> 	const int index2 = *((const int *) v2);
>diff --git a/sys/sys/libkern.h b/sys/sys/libkern.h
>index 41844fa7490e..8adeeb499984 100644
>--- a/sys/sys/libkern.h
>+++ b/sys/sys/libkern.h
>@@ -163,8 +163,8 @@ void	*memcchr(const void *s, int c, size_t n);
> void	*memmem(const void *l, size_t l_len, const void *s, size_t s_len);
> void	 qsort(void *base, size_t nmemb, size_t size,
> 	    int (*compar)(const void *, const void *));
>-void	 qsort_r(void *base, size_t nmemb, size_t size, void *thunk,
>-	    int (*compar)(void *, const void *, const void *));
>+void	 qsort_r(void *base, size_t nmemb, size_t size,
>+	    int (*compar)(const void *, const void *, void *), void *thunk);
> u_long	 random(void);
> int	 scanc(u_int, const u_char *, const u_char *, int);
> int	 strcasecmp(const char *, const char *);
>-- 
>2.37.3
>

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