[PATCH] Allow linker to eliminate unused functions in lib/*

From: Andi Kleen
Date: Tue Jan 05 2010 - 09:59:29 EST

Allow linker to eliminate unused functions in lib/*

Right now a lot of code in lib/* is obj-y and always linked
in. The reason is that there is no other way to ensure the EXPORT_SYMBOLs
get included.

This patch moves the EXPORT_SYMBOLs into separate files instead. This
way the files actually implementing the code can be made lib-y again,
and the separate export symbols pull them in for modular kernels.

For non modular kernels the linker can decide whether to use them
or not.

This shrinks a allnoconfig+CONFIG_EMBEDDED=y+all options disabled
kernel by about 1k on x86. Not much, but also not too shabby.

In some ways that's similar to the old ksyms.c files, but
not as centralized.

I didn't do this for the functions in lib/* which already have
Kconfig symbol. Presumably that is usually only set on demand
when they are actually needed (although I'm not sure it's true
for all cases).

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

---
lib/Makefile | 8 +++++++-
lib/bcd.c | 3 ---
lib/bitmap.c | 34 ++++------------------------------
lib/debug_locks.c | 1 -
lib/div64.c | 7 +------
lib/gcd.c | 3 +--
lib/halfmd4.c | 3 +--
lib/hexdump.c | 5 -----
lib/kasprintf.c | 6 +++---
lib/lib-syms.c | 37 ++++++++++++++++++++++++++++++++++++-
lib/parser.c | 9 +--------
lib/random32.c | 3 ---
lib/scatterlist.c | 19 +++++--------------
lib/sort.c | 2 --
lib/string_helpers.c | 3 +--
15 files changed, 60 insertions(+), 83 deletions(-)

Index: linux-2.6.33-rc2-ak/lib/Makefile
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/Makefile
+++ linux-2.6.33-rc2-ak/lib/Makefile
@@ -7,6 +7,10 @@ ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
endif

+# Please put EXPORT_SYMBOLs into lib-syms.c or an own file (and make
+# only that obj-y), not into the files directly.
+# This way the linker can eliminate unneeded code on non modular kernels.
+
lib-y := ctype.o string.o vsprintf.o cmdline.o \
rbtree.o radix-tree.o dump_stack.o \
idr.o int_sqrt.o extable.o prio_tree.o \
@@ -19,10 +23,12 @@ lib-$(CONFIG_SMP) += cpumask.o

lib-y += kobject.o kref.o klist.o

-obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
+lib-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
string_helpers.o gcd.o

+obj-y += bitmap-syms.o lib-syms.o scatterlist-syms.o
+
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
CFLAGS_kobject_uevent.o += -DDEBUG
Index: linux-2.6.33-rc2-ak/lib/bcd.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/bcd.c
+++ linux-2.6.33-rc2-ak/lib/bcd.c
@@ -1,14 +1,11 @@
#include <linux/bcd.h>
-#include <linux/module.h>

unsigned bcd2bin(unsigned char val)
{
return (val & 0x0f) + (val >> 4) * 10;
}
-EXPORT_SYMBOL(bcd2bin);

unsigned char bin2bcd(unsigned val)
{
return ((val / 10) << 4) + val % 10;
}
-EXPORT_SYMBOL(bin2bcd);
Index: linux-2.6.33-rc2-ak/lib/bitmap.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/bitmap.c
+++ linux-2.6.33-rc2-ak/lib/bitmap.c
@@ -5,7 +5,6 @@
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
-#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/errno.h>
#include <linux/bitmap.h>
@@ -13,6 +12,10 @@
#include <asm/uaccess.h>

/*
+ * Please put EXPORT_SYMBOLs into bitmap-syms.c
+ */
+
+/*
* bitmaps provide an array of bits, implemented using an an
* array of unsigned longs. The number of valid bits in a
* given bitmap does _not_ need to be an exact multiple of
@@ -51,7 +54,6 @@ int __bitmap_empty(const unsigned long *

return 1;
}
-EXPORT_SYMBOL(__bitmap_empty);

int __bitmap_full(const unsigned long *bitmap, int bits)
{
@@ -66,7 +68,6 @@ int __bitmap_full(const unsigned long *b

return 1;
}
-EXPORT_SYMBOL(__bitmap_full);

int __bitmap_equal(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -82,7 +83,6 @@ int __bitmap_equal(const unsigned long *

return 1;
}
-EXPORT_SYMBOL(__bitmap_equal);

void __bitmap_complement(unsigned long *dst, const unsigned long *src, int bits)
{
@@ -93,7 +93,6 @@ void __bitmap_complement(unsigned long *
if (bits % BITS_PER_LONG)
dst[k] = ~src[k] & BITMAP_LAST_WORD_MASK(bits);
}
-EXPORT_SYMBOL(__bitmap_complement);

/**
* __bitmap_shift_right - logical right shift of the bits in a bitmap
@@ -136,7 +135,6 @@ void __bitmap_shift_right(unsigned long
if (off)
memset(&dst[lim - off], 0, off*sizeof(unsigned long));
}
-EXPORT_SYMBOL(__bitmap_shift_right);


/**
@@ -177,7 +175,6 @@ void __bitmap_shift_left(unsigned long *
if (off)
memset(dst, 0, off*sizeof(unsigned long));
}
-EXPORT_SYMBOL(__bitmap_shift_left);

int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -190,7 +187,6 @@ int __bitmap_and(unsigned long *dst, con
result |= (dst[k] = bitmap1[k] & bitmap2[k]);
return result != 0;
}
-EXPORT_SYMBOL(__bitmap_and);

void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -201,7 +197,6 @@ void __bitmap_or(unsigned long *dst, con
for (k = 0; k < nr; k++)
dst[k] = bitmap1[k] | bitmap2[k];
}
-EXPORT_SYMBOL(__bitmap_or);

void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -212,7 +207,6 @@ void __bitmap_xor(unsigned long *dst, co
for (k = 0; k < nr; k++)
dst[k] = bitmap1[k] ^ bitmap2[k];
}
-EXPORT_SYMBOL(__bitmap_xor);

int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -225,7 +219,6 @@ int __bitmap_andnot(unsigned long *dst,
result |= (dst[k] = bitmap1[k] & ~bitmap2[k]);
return result != 0;
}
-EXPORT_SYMBOL(__bitmap_andnot);

int __bitmap_intersects(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -240,7 +233,6 @@ int __bitmap_intersects(const unsigned l
return 1;
return 0;
}
-EXPORT_SYMBOL(__bitmap_intersects);

int __bitmap_subset(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits)
@@ -255,7 +247,6 @@ int __bitmap_subset(const unsigned long
return 0;
return 1;
}
-EXPORT_SYMBOL(__bitmap_subset);

int __bitmap_weight(const unsigned long *bitmap, int bits)
{
@@ -269,7 +260,6 @@ int __bitmap_weight(const unsigned long

return w;
}
-EXPORT_SYMBOL(__bitmap_weight);

#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))

@@ -292,7 +282,6 @@ void bitmap_set(unsigned long *map, int
*p |= mask_to_set;
}
}
-EXPORT_SYMBOL(bitmap_set);

void bitmap_clear(unsigned long *map, int start, int nr)
{
@@ -313,7 +302,6 @@ void bitmap_clear(unsigned long *map, in
*p &= ~mask_to_clear;
}
}
-EXPORT_SYMBOL(bitmap_clear);

/*
* bitmap_find_next_zero_area - find a contiguous aligned zero area
@@ -350,7 +338,6 @@ again:
}
return index;
}
-EXPORT_SYMBOL(bitmap_find_next_zero_area);

/*
* Bitmap printing & parsing functions: first version by Bill Irwin,
@@ -398,7 +385,6 @@ int bitmap_scnprintf(char *buf, unsigned
}
return len;
}
-EXPORT_SYMBOL(bitmap_scnprintf);

/**
* __bitmap_parse - convert an ASCII hex string into a bitmap.
@@ -484,7 +470,6 @@ int __bitmap_parse(const char *buf, unsi

return 0;
}
-EXPORT_SYMBOL(__bitmap_parse);

/**
* bitmap_parse_user()
@@ -509,7 +494,6 @@ int bitmap_parse_user(const char __user
return -EFAULT;
return __bitmap_parse((const char *)ubuf, ulen, 1, maskp, nmaskbits);
}
-EXPORT_SYMBOL(bitmap_parse_user);

/*
* bscnl_emit(buf, buflen, rbot, rtop, bp)
@@ -569,7 +553,6 @@ int bitmap_scnlistprintf(char *buf, unsi
}
return len;
}
-EXPORT_SYMBOL(bitmap_scnlistprintf);

/**
* bitmap_parselist - convert list format ASCII string to bitmap
@@ -616,7 +599,6 @@ int bitmap_parselist(const char *bp, uns
} while (*bp != '\0' && *bp != '\n');
return 0;
}
-EXPORT_SYMBOL(bitmap_parselist);

/**
* bitmap_pos_to_ord(buf, pos, bits)
@@ -743,7 +725,6 @@ void bitmap_remap(unsigned long *dst, co
set_bit(bitmap_ord_to_pos(new, n % w, bits), dst);
}
}
-EXPORT_SYMBOL(bitmap_remap);

/**
* bitmap_bitremap - Apply map defined by a pair of bitmaps to a single bit
@@ -781,7 +762,6 @@ int bitmap_bitremap(int oldbit, const un
else
return bitmap_ord_to_pos(new, n % w, bits);
}
-EXPORT_SYMBOL(bitmap_bitremap);

/**
* bitmap_onto - translate one bitmap relative to another
@@ -912,7 +892,6 @@ void bitmap_onto(unsigned long *dst, con
m++;
}
}
-EXPORT_SYMBOL(bitmap_onto);

/**
* bitmap_fold - fold larger bitmap into smaller, modulo specified size
@@ -939,7 +918,6 @@ void bitmap_fold(unsigned long *dst, con
oldbit = find_next_bit(orig, bits, oldbit + 1))
set_bit(oldbit % sz, dst);
}
-EXPORT_SYMBOL(bitmap_fold);

/*
* Common code for bitmap_*_region() routines.
@@ -1043,7 +1021,6 @@ int bitmap_find_free_region(unsigned lon
}
return -ENOMEM;
}
-EXPORT_SYMBOL(bitmap_find_free_region);

/**
* bitmap_release_region - release allocated bitmap region
@@ -1060,7 +1037,6 @@ void bitmap_release_region(unsigned long
{
__reg_op(bitmap, pos, order, REG_OP_RELEASE);
}
-EXPORT_SYMBOL(bitmap_release_region);

/**
* bitmap_allocate_region - allocate bitmap region
@@ -1080,7 +1056,6 @@ int bitmap_allocate_region(unsigned long
__reg_op(bitmap, pos, order, REG_OP_ALLOC);
return 0;
}
-EXPORT_SYMBOL(bitmap_allocate_region);

/**
* bitmap_copy_le - copy a bitmap, putting the bits into little-endian order.
@@ -1102,4 +1077,3 @@ void bitmap_copy_le(void *dst, const uns
d[i] = cpu_to_le32(src[i]);
}
}
-EXPORT_SYMBOL(bitmap_copy_le);
Index: linux-2.6.33-rc2-ak/lib/debug_locks.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/debug_locks.c
+++ linux-2.6.33-rc2-ak/lib/debug_locks.c
@@ -11,7 +11,6 @@
#include <linux/kernel.h>
#include <linux/rwsem.h>
#include <linux/mutex.h>
-#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/debug_locks.h>

Index: linux-2.6.33-rc2-ak/lib/div64.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/div64.c
+++ linux-2.6.33-rc2-ak/lib/div64.c
@@ -16,7 +16,6 @@
* assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S.
*/

-#include <linux/module.h>
#include <linux/math64.h>

/* Not needed on 64bit architectures */
@@ -55,8 +54,6 @@ uint32_t __attribute__((weak)) __div64_3
return rem;
}

-EXPORT_SYMBOL(__div64_32);
-
#ifndef div_s64_rem
s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder)
{
@@ -74,7 +71,6 @@ s64 div_s64_rem(s64 dividend, s32 diviso
}
return quotient;
}
-EXPORT_SYMBOL(div_s64_rem);
#endif

/* 64bit divisor, dividend and result. dynamic precision */
@@ -94,7 +90,6 @@ u64 div64_u64(u64 dividend, u64 divisor)

return div_u64(dividend, d);
}
-EXPORT_SYMBOL(div64_u64);
#endif

#endif /* BITS_PER_LONG == 32 */
@@ -107,4 +102,4 @@ u32 iter_div_u64_rem(u64 dividend, u32 d
{
return __iter_div_u64_rem(dividend, divisor, remainder);
}
-EXPORT_SYMBOL(iter_div_u64_rem);
+
Index: linux-2.6.33-rc2-ak/lib/gcd.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/gcd.c
+++ linux-2.6.33-rc2-ak/lib/gcd.c
@@ -1,6 +1,5 @@
#include <linux/kernel.h>
#include <linux/gcd.h>
-#include <linux/module.h>

/* Greatest common divisor */
unsigned long gcd(unsigned long a, unsigned long b)
@@ -15,4 +14,4 @@ unsigned long gcd(unsigned long a, unsig
}
return b;
}
-EXPORT_SYMBOL_GPL(gcd);
+
Index: linux-2.6.33-rc2-ak/lib/halfmd4.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/halfmd4.c
+++ linux-2.6.33-rc2-ak/lib/halfmd4.c
@@ -1,5 +1,4 @@
#include <linux/kernel.h>
-#include <linux/module.h>
#include <linux/cryptohash.h>

/* F, G and H are basic MD4 functions: selection, majority, parity */
@@ -63,4 +62,4 @@ __u32 half_md4_transform(__u32 buf[4], _

return buf[1]; /* "most hashed" word */
}
-EXPORT_SYMBOL(half_md4_transform);
+
Index: linux-2.6.33-rc2-ak/lib/hexdump.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/hexdump.c
+++ linux-2.6.33-rc2-ak/lib/hexdump.c
@@ -10,10 +10,8 @@
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
-#include <linux/module.h>

const char hex_asc[] = "0123456789abcdef";
-EXPORT_SYMBOL(hex_asc);

/**
* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
@@ -117,7 +115,6 @@ void hex_dump_to_buffer(const void *buf,
nil:
linebuf[lx++] = '\0';
}
-EXPORT_SYMBOL(hex_dump_to_buffer);

/**
* print_hex_dump - print a text hex dump to syslog for a binary blob of data
@@ -181,7 +178,6 @@ void print_hex_dump(const char *level, c
}
}
}
-EXPORT_SYMBOL(print_hex_dump);

/**
* print_hex_dump_bytes - shorthand form of print_hex_dump() with default params
@@ -201,4 +197,3 @@ void print_hex_dump_bytes(const char *pr
print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,
buf, len, 1);
}
-EXPORT_SYMBOL(print_hex_dump_bytes);
Index: linux-2.6.33-rc2-ak/lib/kasprintf.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/kasprintf.c
+++ linux-2.6.33-rc2-ak/lib/kasprintf.c
@@ -5,9 +5,10 @@
*/

#include <stdarg.h>
-#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>

/* Simplified asprintf. */
char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
@@ -28,7 +29,6 @@ char *kvasprintf(gfp_t gfp, const char *

return p;
}
-EXPORT_SYMBOL(kvasprintf);

char *kasprintf(gfp_t gfp, const char *fmt, ...)
{
@@ -41,4 +41,4 @@ char *kasprintf(gfp_t gfp, const char *f

return p;
}
-EXPORT_SYMBOL(kasprintf);
+
Index: linux-2.6.33-rc2-ak/lib/parser.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/parser.c
+++ linux-2.6.33-rc2-ak/lib/parser.c
@@ -5,8 +5,8 @@
* Version 2. See the file COPYING for more details.
*/

+#include <linux/types.h>
#include <linux/ctype.h>
-#include <linux/module.h>
#include <linux/parser.h>
#include <linux/slab.h>
#include <linux/string.h>
@@ -222,10 +222,3 @@ char *match_strdup(const substring_t *s)
match_strlcpy(p, s, sz);
return p;
}
-
-EXPORT_SYMBOL(match_token);
-EXPORT_SYMBOL(match_int);
-EXPORT_SYMBOL(match_octal);
-EXPORT_SYMBOL(match_hex);
-EXPORT_SYMBOL(match_strlcpy);
-EXPORT_SYMBOL(match_strdup);
Index: linux-2.6.33-rc2-ak/lib/random32.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/random32.c
+++ linux-2.6.33-rc2-ak/lib/random32.c
@@ -35,7 +35,6 @@

#include <linux/types.h>
#include <linux/percpu.h>
-#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/random.h>

@@ -79,7 +78,6 @@ u32 random32(void)
put_cpu_var(state);
return r;
}
-EXPORT_SYMBOL(random32);

/**
* srandom32 - add entropy to pseudo random number generator
@@ -99,7 +97,6 @@ void srandom32(u32 entropy)
state->s1 = __seed(state->s1 ^ entropy, 1);
}
}
-EXPORT_SYMBOL(srandom32);

/*
* Generate some initially weak seeding values to allow
Index: linux-2.6.33-rc2-ak/lib/scatterlist.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/scatterlist.c
+++ linux-2.6.33-rc2-ak/lib/scatterlist.c
@@ -6,10 +6,13 @@
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
-#include <linux/module.h>
#include <linux/scatterlist.h>
#include <linux/highmem.h>

+/*
+ * Please put EXPORT_SYMBOLs into scatterlist-syms.c
+ */
+
/**
* sg_next - return the next scatterlist entry in a list
* @sg: The current sg entry
@@ -34,7 +37,6 @@ struct scatterlist *sg_next(struct scatt

return sg;
}
-EXPORT_SYMBOL(sg_next);

/**
* sg_last - return the last scatterlist entry in a list
@@ -68,7 +70,6 @@ struct scatterlist *sg_last(struct scatt
#endif
return ret;
}
-EXPORT_SYMBOL(sg_last);

/**
* sg_init_table - Initialize SG table
@@ -92,7 +93,6 @@ void sg_init_table(struct scatterlist *s
#endif
sg_mark_end(&sgl[nents - 1]);
}
-EXPORT_SYMBOL(sg_init_table);

/**
* sg_init_one - Initialize a single entry sg list
@@ -106,7 +106,6 @@ void sg_init_one(struct scatterlist *sg,
sg_init_table(sg, 1);
sg_set_buf(sg, buf, buflen);
}
-EXPORT_SYMBOL(sg_init_one);

/*
* The default behaviour of sg_alloc_table() is to use these kmalloc/kfree
@@ -175,7 +174,6 @@ void __sg_free_table(struct sg_table *ta

table->sgl = NULL;
}
-EXPORT_SYMBOL(__sg_free_table);

/**
* sg_free_table - Free a previously allocated sg table
@@ -186,7 +184,6 @@ void sg_free_table(struct sg_table *tabl
{
__sg_free_table(table, SG_MAX_SINGLE_ALLOC, sg_kfree);
}
-EXPORT_SYMBOL(sg_free_table);

/**
* __sg_alloc_table - Allocate and initialize an sg table with given allocator
@@ -268,7 +265,6 @@ int __sg_alloc_table(struct sg_table *ta

return 0;
}
-EXPORT_SYMBOL(__sg_alloc_table);

/**
* sg_alloc_table - Allocate and initialize an sg table
@@ -292,7 +288,6 @@ int sg_alloc_table(struct sg_table *tabl

return ret;
}
-EXPORT_SYMBOL(sg_alloc_table);

/**
* sg_miter_start - start mapping iteration over a sg list
@@ -317,7 +312,6 @@ void sg_miter_start(struct sg_mapping_it
WARN_ON(!(flags & (SG_MITER_TO_SG | SG_MITER_FROM_SG)));
miter->__flags = flags;
}
-EXPORT_SYMBOL(sg_miter_start);

/**
* sg_miter_next - proceed mapping iterator to the next mapping
@@ -372,7 +366,6 @@ bool sg_miter_next(struct sg_mapping_ite

return true;
}
-EXPORT_SYMBOL(sg_miter_next);

/**
* sg_miter_stop - stop mapping iteration
@@ -410,7 +403,6 @@ void sg_miter_stop(struct sg_mapping_ite
miter->consumed = 0;
}
}
-EXPORT_SYMBOL(sg_miter_stop);

/**
* sg_copy_buffer - Copy data between a linear buffer and an SG list
@@ -475,7 +467,6 @@ size_t sg_copy_from_buffer(struct scatte
{
return sg_copy_buffer(sgl, nents, buf, buflen, 0);
}
-EXPORT_SYMBOL(sg_copy_from_buffer);

/**
* sg_copy_to_buffer - Copy from an SG list to a linear buffer
@@ -492,4 +483,4 @@ size_t sg_copy_to_buffer(struct scatterl
{
return sg_copy_buffer(sgl, nents, buf, buflen, 1);
}
-EXPORT_SYMBOL(sg_copy_to_buffer);
+
Index: linux-2.6.33-rc2-ak/lib/sort.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/sort.c
+++ linux-2.6.33-rc2-ak/lib/sort.c
@@ -87,8 +87,6 @@ void sort(void *base, size_t num, size_t
}
}

-EXPORT_SYMBOL(sort);
-
#if 0
/* a simple boot-time regression test */

Index: linux-2.6.33-rc2-ak/lib/string_helpers.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/string_helpers.c
+++ linux-2.6.33-rc2-ak/lib/string_helpers.c
@@ -5,7 +5,6 @@
*/
#include <linux/kernel.h>
#include <linux/math64.h>
-#include <linux/module.h>
#include <linux/string_helpers.h>

/**
@@ -65,4 +64,4 @@ int string_get_size(u64 size, const enum

return 0;
}
-EXPORT_SYMBOL(string_get_size);
+
Index: linux-2.6.33-rc2-ak/lib/lib-syms.c
===================================================================
--- linux-2.6.33-rc2-ak.orig/lib/lib-syms.c
+++ linux-2.6.33-rc2-ak/lib/lib-syms.c
@@ -5,9 +5,13 @@
* On modular kernels it keeps a reference to all the lib files with
* exports so that they can be used by modules. On non modular
* kernels it does nothing and the linker can decide whether a lib
- * object file is needed or not.
+ * object file is needed or not. This way unneeded library functions
+ * can be eliminated.
*/

+#include <linux/types.h>
+#include <linux/module.h>
+
#include <linux/bcd.h>
EXPORT_SYMBOL(bcd2bin);
EXPORT_SYMBOL(bin2bcd);
@@ -24,4 +28,35 @@ EXPORT_SYMBOL(div64_u64);
#endif
EXPORT_SYMBOL(iter_div_u64_rem);

+#include <linux/sort.h>
+EXPORT_SYMBOL(sort);
+
+#include <linux/parser.h>
+EXPORT_SYMBOL(match_token);
+EXPORT_SYMBOL(match_int);
+EXPORT_SYMBOL(match_octal);
+EXPORT_SYMBOL(match_hex);
+EXPORT_SYMBOL(match_strlcpy);
+EXPORT_SYMBOL(match_strdup);
+
+#include <linux/cryptohash.h>
+EXPORT_SYMBOL(half_md4_transform);
+
+#include <linux/random.h>
+EXPORT_SYMBOL(random32);
+EXPORT_SYMBOL(srandom32);
+
+#include <linux/kernel.h>
+EXPORT_SYMBOL(hex_asc);
+EXPORT_SYMBOL(hex_dump_to_buffer);
+EXPORT_SYMBOL(print_hex_dump);
+EXPORT_SYMBOL(print_hex_dump_bytes);
+
+EXPORT_SYMBOL(kvasprintf);
+EXPORT_SYMBOL(kasprintf);
+
+#include <linux/string_helpers.h>
+EXPORT_SYMBOL(string_get_size);

+#include <linux/gcd.h>
+EXPORT_SYMBOL_GPL(gcd);
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