See https://github.com/kdave/btrfs-progs/commit/992be8b50a65974e52a484911e72bc5a5e1b412c.

With binutils-2.41[hardened], one gets:
```
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: crypto/crc32c-pcl-intel-asm_64.o: warning: relocation in read-only section `.rodata'
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: read-only segment has dynamic relocations
collect2: error: ld returned 1 exit status
make: *** [Makefile:660: btrfs-map-logical] Error 1
```

But it's a textrel and a warning anyway even without hardened.

Disable it for now until it gets fixed properly upstream.
--- a/Makefile
+++ b/Makefile
@@ -387,7 +387,7 @@ endif
 
 ifeq ($(TARGET_CPU),x86_64)
 # FIXME: linkage is broken on musl for some reason
-ifeq ($(HAVE_GLIBC),1)
+ifeq (0,1)
 CRYPTO_OBJECTS += crypto/crc32c-pcl-intel-asm_64.o
 ASFLAGS += -fPIC
 endif
--- a/crypto/crc32c.c
+++ b/crypto/crc32c.c
@@ -18,7 +18,7 @@ static uint32_t (*crc_function)(uint32_t crc, unsigned char const *data, uint32_
 
 #ifdef __x86_64__
 
-#ifdef __GLIBC__
+#if 0
 
 /* asmlinkage */ unsigned int crc_pcl(const unsigned char *buffer, int len, unsigned int crc_init);
 static unsigned int crc32c_pcl(uint32_t crc, unsigned char const *data, uint32_t len) {
@@ -95,7 +95,7 @@ void crc32c_init_accel(void)
 	 * now.
 	 */
 	if (0) {
-#ifdef __GLIBC__
+#if 0
 	} else if (cpu_has_feature(CPU_FLAG_SSE42)) {
 		/* printf("CRC32C: pcl\n"); */
 		crc_function = crc32c_pcl;