1 files changed, 28 insertions, 7 deletions

diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 8f7bef8e9fff..3a19d04cebeb 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -139,6 +139,10 @@ static int lines, cols;
 #include "../../../../lib/decompress_unlzma.c"
 #endif
 
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
 #ifdef CONFIG_KERNEL_LZO
 #include "../../../../lib/decompress_unlzo.c"
 #endif
@@ -229,18 +233,35 @@ void *memset(void *s, int c, size_t n)
                 ss[i] = c;
         return s;
 }
-
+#ifdef CONFIG_X86_32
 void *memcpy(void *dest, const void *src, size_t n)
 {
-        int i;
-        const char *s = src;
-        char *d = dest;
+        int d0, d1, d2;
+        asm volatile(
+                "rep ; movsl\n\t"
+                "movl %4,%%ecx\n\t"
+                "rep ; movsb\n\t"
+                : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+                : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
+                : "memory");
 
-        for (i = 0; i < n; i++)
-                d[i] = s[i];
         return dest;
 }
+#else
+void *memcpy(void *dest, const void *src, size_t n)
+{
+        long d0, d1, d2;
+        asm volatile(
+                "rep ; movsq\n\t"
+                "movq %4,%%rcx\n\t"
+                "rep ; movsb\n\t"
+                : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+                : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
+                : "memory");
 
+        return dest;
+}
+#endif
 
 static void error(char *x)
 {
@@ -338,7 +359,7 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
         if (heap > 0x3fffffffffffUL)
                 error("Destination address too large");
 #else
-        if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff))
+        if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff))
                 error("Destination address too large");
 #endif
 #ifndef CONFIG_RELOCATABLE