btrfs-progs: update to 3.17.1; added patches for musl via Alpine.

srcpkgs/btrfs-progs/patches/includes.patch

@@ -0,0 +1,39 @@
+diff --git a/bitops.h b/bitops.h
+index 323c571..7f30b06 100644
+--- bitops.h
++++ bitops.h
+@@ -65,6 +65,9 @@ static inline unsigned long hweight_long(unsigned long w)
+ }
+ 
+ #define BITOP_WORD(nr)		((nr) / BITS_PER_LONG)
++#ifndef __always_inline
++#define __always_inline         inline __attribute__((always_inline))
++#endif
+ 
+ /**
+  * __ffs - find first bit in word.
+diff --git a/kerncompat.h.orig b/kerncompat.h
+index bb03194e127e..28f832a2e625 100644
+--- kerncompat.h
++++ kerncompat.h
+@@ -28,6 +28,7 @@
+ #include <assert.h>
+ #include <stddef.h>
+ #include <linux/types.h>
++#include <linux/limits.h>
+ #include <stdint.h>
+ 
+ #define ptr_to_u64(x)	((u64)(uintptr_t)x)
+--- rbtree.h
++++ rbtree.h
+@@ -38,6 +38,10 @@
+ extern "C" {
+ #endif
+ 
++#ifndef __always_inline
++#define __always_inline         inline __attribute__((always_inline))
++#endif
++
+ struct rb_node {
+ 	unsigned long  __rb_parent_color;
+ 	struct rb_node *rb_right;

srcpkgs/btrfs-progs/patches/musl-compat.patch

@@ -0,0 +1,23 @@
+--- utils.c
++++ utils.c
+@@ -833,13 +833,19 @@
+ {
+ 	int ret;
+ 	FILE *f;
++	struct stat stat_buf;
+ 	char fmt[20];
+ 	char p[PATH_MAX];
+ 	char real_loop_dev[PATH_MAX];
+ 
+ 	if (!realpath(loop_dev, real_loop_dev))
+ 		return -errno;
+-	snprintf(p, PATH_MAX, "/sys/block/%s/loop/backing_file", strrchr(real_loop_dev, '/'));
++	
++        if (stat(real_loop_dev, &stat_buf) || !S_ISBLK(stat_buf.st_mode))
++                return -errno;
++
++        snprintf(p, PATH_MAX, "/sys/dev/block/%d:%d/loop/backing_file",
++                major(stat_buf.st_rdev), minor(stat_buf.st_rdev));
+ 	if (!(f = fopen(p, "r")))
+ 		return -errno;
+ 

srcpkgs/btrfs-progs/template

@@ -1,6 +1,6 @@
 # Template file for 'btrfs-progs'
 pkgname=btrfs-progs
-_distver=3.17
+_distver=3.17.1
 # DO NOT MODIFY DATEVER!
 _datever=20141006
 version=${_datever}.${_distver}
@@ -16,7 +16,7 @@ do_fetch() {
 	git clone -b v${_distver} git://git.kernel.org/pub/scm/linux/kernel/git/kdave/${pkgname}.git ${pkgname}-${version}
 }
 do_build() {
-	make CC="$CC" CFLAGS="$CFLAGS" ${makejobs}
+	make DISABLE_BACKTRACE=1 CC="$CC" CFLAGS="$CFLAGS" ${makejobs}
 }
 do_install() {
 	sed -i '/LNS/d' Documentation/Makefile