lzma: Move the bulk of kexec-lzma.h into lzma.c

There isn't any need for anything in kexec-lzma.h other
than a declaration of zlib_decompress_file().

Other being cleaner it also fixes a build problem when
lzma support isn't being compiled in.

$ make all
i686-unknown-linux-gnu-gcc -Wall -Wextra -O2 -fomit-frame-pointer -pipe -fno-strict-aliasing -Wall -Wstrict-prototypes -I/home/horms/local/opt/crosstool/i686/gcc-3.4.5-glibc-2.3.6/i686-unknown-linux-gnu/include -I./include -I./util_lib/include -Iinclude/ -I./kexec/arch/i386/include  -c
-MD -o kexec/kexec.o kexec/kexec.c
In file included from kexec/kexec.c:47:
kexec/kexec-lzma.h:8:18: lzma.h: No such file or directory
kexec/kexec.c: In function `locate_hole':
kexec/kexec.c:203: warning: comparison between signed and unsigned

It ought to be possible to just provide a stub for zlib_decompress_file()
in kexec-lzma.h and not compile lzma.c at all in the case where
lzma support isn't being compiled in. However I see no obvious way
to do this with the existing build system. So I'd like to deal
with that as a separate possible change.

Changes as suggested by Eric W. Biederman.

Cc: Florian Fainelli <florian@openwrt.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

2 files changed, 20 insertions, 24 deletions

diff --git a/kexec/kexec-lzma.h b/kexec/kexec-lzma.h
index c78cdf7..d3b751a 100644
--- a/kexec/kexec-lzma.h
+++ b/kexec/kexec-lzma.h
@@ -1,29 +1,8 @@
 #ifndef __KEXEC_LZMA_H
 #define __KEXEC_LZMA_H
 
-#include <stdio.h>
 #include <sys/types.h>
-#include <unistd.h>
-#include <inttypes.h>
-#include <lzma.h>
-
-#include "config.h"
-
-#ifdef HAVE_LIBLZMA
-#define kBufferSize (1 << 15)
-
-typedef struct lzfile {
-	uint8_t buf[kBufferSize];
-	lzma_stream strm;
-	FILE *file;
-	int encoding;
-	int eof;
-} LZFILE;
-
-LZFILE *lzopen(const char *path, const char *mode);
-int lzclose(LZFILE *lzfile);
-ssize_t lzread(LZFILE *lzfile, void *buf, size_t len);
-#endif /* HAVE_LIBLZMA */
 
 char *lzma_decompress_file(const char *filename, off_t *r_size);
+
 #endif /* __KEXEC_LZMA_H */
diff --git a/kexec/lzma.c b/kexec/lzma.c
index 5329cd8..20bc1ea 100644
--- a/kexec/lzma.c
+++ b/kexec/lzma.c
@@ -1,4 +1,9 @@
+#include <unistd.h>
+#include <sys/types.h>
+
 #include "kexec-lzma.h"
+#include "config.h"
+
 #ifdef HAVE_LIBLZMA
 #define _GNU_SOURCE
 #include <stdio.h>
@@ -7,14 +12,26 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <limits.h>
-#include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 #include <ctype.h>
 #include <lzma.h>
 
 #include "kexec.h"
 
+#define kBufferSize (1 << 15)
+
+typedef struct lzfile {
+	uint8_t buf[kBufferSize];
+	lzma_stream strm;
+	FILE *file;
+	int encoding;
+	int eof;
+} LZFILE;
+
+LZFILE *lzopen(const char *path, const char *mode);
+int lzclose(LZFILE *lzfile);
+ssize_t lzread(LZFILE *lzfile, void *buf, size_t len);
+
 static LZFILE *lzopen_internal(const char *path, const char *mode, int fd)
 {
 	int level = 5;