From 491e6409b8fd8c724f13632715012b157e867e16 Mon Sep 17 00:00:00 2001 From: Phillip Lougher Date: Mon, 11 Jan 2010 16:15:00 +0100 Subject: [PATCH] lzma: Make lzma available to non initramfs/initrd code Add a config option DECOMPRESS_LZMA_NEEDED which allows subsystems to specify they need the unlzma code. Normally decompress_unlzma.c is compiled with __init and unlzma is not exported to modules. Move INIT definition into separate header files for bzip2/lzma/inflate/lzo so it can be defined differently for each decompressor. Signed-off-by: Phillip Lougher --- include/linux/decompress/bunzip2_mm.h | 12 ++++++++++++ include/linux/decompress/inflate_mm.h | 12 ++++++++++++ include/linux/decompress/mm.h | 3 --- include/linux/decompress/unlzma_mm.h | 20 ++++++++++++++++++++ include/linux/decompress/unlzo_mm.h | 12 ++++++++++++ lib/Kconfig | 3 +++ lib/decompress_bunzip2.c | 1 + lib/decompress_inflate.c | 1 + lib/decompress_unlzma.c | 6 +++++- lib/decompress_unlzo.c | 1 + 10 files changed, 67 insertions(+), 4 deletions(-) create mode 100644 include/linux/decompress/bunzip2_mm.h create mode 100644 include/linux/decompress/inflate_mm.h create mode 100644 include/linux/decompress/unlzma_mm.h create mode 100644 include/linux/decompress/unlzo_mm.h diff --git a/include/linux/decompress/bunzip2_mm.h b/include/linux/decompress/bunzip2_mm.h new file mode 100644 index 0000000..cac6fef --- /dev/null +++ b/include/linux/decompress/bunzip2_mm.h @@ -0,0 +1,12 @@ +#ifndef BUNZIP2_MM_H +#define BUNZIP2_MM_H + +#ifdef STATIC +/* Code active when included from pre-boot environment: */ +#define INIT +#else +/* Compile for initramfs/initrd code only */ +#define INIT __init +#endif + +#endif diff --git a/include/linux/decompress/inflate_mm.h b/include/linux/decompress/inflate_mm.h new file mode 100644 index 0000000..ca4a2ae --- /dev/null +++ b/include/linux/decompress/inflate_mm.h @@ -0,0 +1,12 @@ +#ifndef INFLATE_MM_H +#define INFLATE_MM_H + +#ifdef STATIC +/* Code active when included from pre-boot environment: */ +#define INIT +#else +/* Compile for initramfs/initrd code only */ +#define INIT __init +#endif + +#endif diff --git a/include/linux/decompress/mm.h b/include/linux/decompress/mm.h index ad5ec1d..f3f6526 100644 --- a/include/linux/decompress/mm.h +++ b/include/linux/decompress/mm.h @@ -63,8 +63,6 @@ static void free(void *where) #define set_error_fn(x) -#define INIT - #else /* STATIC */ /* Code active when compiled standalone for use when loading ramdisk: */ @@ -87,7 +85,6 @@ static void free(void *where) static void(*error)(char *m); #define set_error_fn(x) error = x; -#define INIT __init #define STATIC #include diff --git a/include/linux/decompress/unlzma_mm.h b/include/linux/decompress/unlzma_mm.h new file mode 100644 index 0000000..859287e --- /dev/null +++ b/include/linux/decompress/unlzma_mm.h @@ -0,0 +1,20 @@ +#ifndef UNLZMA_MM_H +#define UNLZMA_MM_H + +#ifdef STATIC + +/* Code active when included from pre-boot environment: */ +#define INIT + +#elif defined(CONFIG_DECOMPRESS_LZMA_NEEDED) + +/* Make it available to non initramfs/initrd code */ +#define INIT +#include +#else + +/* Compile for initramfs/initrd code only */ +#define INIT __init +#endif + +#endif diff --git a/include/linux/decompress/unlzo_mm.h b/include/linux/decompress/unlzo_mm.h new file mode 100644 index 0000000..e3f1573 --- /dev/null +++ b/include/linux/decompress/unlzo_mm.h @@ -0,0 +1,12 @@ +#ifndef UNLZO_MM_H +#define UNLZO_MM_H + +#ifdef STATIC +/* Code active when included from pre-boot environment: */ +#define INIT +#else +/* Compile for initramfs/initrd code only */ +#define INIT __init +#endif + +#endif diff --git a/lib/Kconfig b/lib/Kconfig index 170d8ca..390e88c 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -121,6 +121,9 @@ config DECOMPRESS_LZO select LZO_DECOMPRESS tristate +config DECOMPRESS_LZMA_NEEDED + boolean + # # Generic allocator support is selected if needed # diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c index a4e971d..04386b3 100644 --- a/lib/decompress_bunzip2.c +++ b/lib/decompress_bunzip2.c @@ -52,6 +52,7 @@ #include #endif /* STATIC */ +#include #include #ifndef INT_MAX diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c index fc686c7..cb6bcab 100644 --- a/lib/decompress_inflate.c +++ b/lib/decompress_inflate.c @@ -23,6 +23,7 @@ #endif /* STATIC */ +#include #include #define GZIP_IOBUF_SIZE (16*1024) diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c index ca82fde..a614b26 100644 --- a/lib/decompress_unlzma.c +++ b/lib/decompress_unlzma.c @@ -36,6 +36,7 @@ #include #endif /* STATIC */ +#include #include #define MIN(a, b) (((a) < (b)) ? (a) : (b)) @@ -531,7 +532,7 @@ static inline void INIT process_bit1(struct writer *wr, struct rc *rc, -STATIC inline int INIT unlzma(unsigned char *buf, int in_len, +STATIC int INIT unlzma(unsigned char *buf, int in_len, int(*fill)(void*, unsigned int), int(*flush)(void*, unsigned int), unsigned char *output, @@ -652,6 +653,9 @@ exit_1: exit_0: return ret; } +#if defined(CONFIG_DECOMPRESS_LZMA_NEEDED) && !defined(PREBOOT) +EXPORT_SYMBOL(unlzma); +#endif #ifdef PREBOOT STATIC int INIT decompress(unsigned char *buf, int in_len, diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c index bcb3a4b..af06d6f 100644 --- a/lib/decompress_unlzo.c +++ b/lib/decompress_unlzo.c @@ -39,6 +39,7 @@ #include #include +#include #include #include -- 1.7.3