[ZLIB]: Fix external builds of zlib_inflate code.

Move zlib_inflate_blob() out into it's own source file,
infutil.c, so that things like the powerpc zImage builder
in arch/powerpc/boot/Makefile don't end up trying to
compile it.

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 50 insertions, 48 deletions

diff --git a/lib/zlib_inflate/Makefile b/lib/zlib_inflate/Makefile
index bf065482fa67..49f8ce5774d2 100644
--- a/lib/zlib_inflate/Makefile
+++ b/lib/zlib_inflate/Makefile
@@ -15,5 +15,5 @@
 
 obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate.o
 
-zlib_inflate-objs := inffast.o inflate.o \
+zlib_inflate-objs := inffast.o inflate.o infutil.o \
                      inftrees.o inflate_syms.o
diff --git a/lib/zlib_inflate/inflate.c b/lib/zlib_inflate/inflate.c
index 0ad1ebf00947..f5ce87b0800e 100644
--- a/lib/zlib_inflate/inflate.c
+++ b/lib/zlib_inflate/inflate.c
@@ -916,50 +916,3 @@ int zlib_inflateIncomp(z_stream *z)
 
     return Z_OK;
 }
-
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
- * return len or negative error code. */
-int zlib_inflate_blob(void *gunzip_buf, unsigned sz, const void *buf, unsigned len)
-{
-        const u8 *zbuf = buf;
-        struct z_stream_s *strm;
-        int rc;
-
-        rc = -ENOMEM;
-        strm = kmalloc(sizeof(*strm), GFP_KERNEL);
-        if (strm == NULL)
-                goto gunzip_nomem1;
-        strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
-        if (strm->workspace == NULL)
-                goto gunzip_nomem2;
-
-        /* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
-         * expected to be stripped from input */
-
-        strm->next_in = zbuf;
-        strm->avail_in = len;
-        strm->next_out = gunzip_buf;
-        strm->avail_out = sz;
-
-        rc = zlib_inflateInit2(strm, -MAX_WBITS);
-        if (rc == Z_OK) {
-                rc = zlib_inflate(strm, Z_FINISH);
-                /* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
-                if (rc == Z_STREAM_END)
-                        rc = sz - strm->avail_out;
-                else
-                        rc = -EINVAL;
-                zlib_inflateEnd(strm);
-        } else
-                rc = -EINVAL;
-
-        kfree(strm->workspace);
-gunzip_nomem2:
-        kfree(strm);
-gunzip_nomem1:
-        return rc; /* returns Z_OK (0) if successful */
-}
diff --git a/lib/zlib_inflate/infutil.c b/lib/zlib_inflate/infutil.c
new file mode 100644
index 000000000000..4824c2cc7a09
--- /dev/null
+++ b/lib/zlib_inflate/infutil.c
@@ -0,0 +1,49 @@
+#include <linux/zutil.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
+ * return len or negative error code.
+ */
+int zlib_inflate_blob(void *gunzip_buf, unsigned int sz,
+                      const void *buf, unsigned int len)
+{
+        const u8 *zbuf = buf;
+        struct z_stream_s *strm;
+        int rc;
+
+        rc = -ENOMEM;
+        strm = kmalloc(sizeof(*strm), GFP_KERNEL);
+        if (strm == NULL)
+                goto gunzip_nomem1;
+        strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
+        if (strm->workspace == NULL)
+                goto gunzip_nomem2;
+
+        /* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
+         * expected to be stripped from input
+         */
+        strm->next_in = zbuf;
+        strm->avail_in = len;
+        strm->next_out = gunzip_buf;
+        strm->avail_out = sz;
+
+        rc = zlib_inflateInit2(strm, -MAX_WBITS);
+        if (rc == Z_OK) {
+                rc = zlib_inflate(strm, Z_FINISH);
+                /* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
+                if (rc == Z_STREAM_END)
+                        rc = sz - strm->avail_out;
+                else
+                        rc = -EINVAL;
+                zlib_inflateEnd(strm);
+        } else
+                rc = -EINVAL;
+
+        kfree(strm->workspace);
+gunzip_nomem2:
+        kfree(strm);
+gunzip_nomem1:
+        return rc; /* returns Z_OK (0) if successful */
+}