Messages in this thread Patch in this message | | | Subject | Re: [PATCH] Shared crc32 for 2.4. | From | David Woodhouse <> | Date | Fri, 23 May 2003 10:28:03 +0100 |
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On Thu, 2003-05-22 at 22:11, David Woodhouse wrote: > On Thu, 2003-05-22 at 00:50, J.A. Magallon wrote: > > This works if crc32.o is compiled as a module, but does not work if it is > > built into the kernel. For example, crc32_le symbol does not appear > > in System.map nor vmlinux. > > Oh bollocks; sorry I'd forgotten about that. > > Added to the tree from which Marcelo will pull for 2.4.22-pre1...
I hereby declare myself to be Today's Official Mr Fuck All Good.
On top of that patch which fixes CONFIG_CRC32=y, you'll need this patch which fixes CONFIG_CRC32=m, newly broken (at least with new modutils) by the removal of the EXPORT_SYMBOL()s from crc32.o...·
Full patch against 2.4.21-rc3 is in ftp://ftp.??.kernel.org/pub/linux/kernel/people/dwmw2/crc32/
(and in master.kernel.org:~dwmw2/BK/crc32-2.4 still)
# This is a BitKeeper generated patch for the following project: # Project Name: Linux kernel tree # This patch format is intended for GNU patch command version 2.5 or higher. # This patch includes the following deltas: # ChangeSet 1.1216 -> 1.1217 # lib/crc32.c 1.2 -> 1.3 # lib/Makefile 1.11 -> 1.12 # # The following is the BitKeeper ChangeSet Log # -------------------------------------------- # 03/05/23 dwmw2@infradead.org 1.1217 # Fix CONFIG_CRC32=m by make crc32.o export its own symbols again in that case. # -------------------------------------------- # diff -Nru a/lib/Makefile b/lib/Makefile --- a/lib/Makefile Fri May 23 10:09:17 2003 +++ b/lib/Makefile Fri May 23 10:09:17 2003 @@ -8,7 +8,8 @@ L_TARGET := lib.a -export-objs := cmdline.o dec_and_lock.o rwsem-spinlock.o rwsem.o rbtree.o +export-objs := cmdline.o dec_and_lock.o rwsem-spinlock.o rwsem.o \ + rbtree.o crc32.o obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o \ bust_spinlocks.o rbtree.o dump_stack.o diff -Nru a/lib/crc32.c b/lib/crc32.c --- a/lib/crc32.c Fri May 23 10:09:17 2003 +++ b/lib/crc32.c Fri May 23 10:09:17 2003 @@ -266,6 +266,13 @@ return x; } +#ifdef MODULE /* These are exported from kernel/ksyms.c in the non-module + case, to ensure that this file is pulled in from lib/lib.a */ +EXPORT_SYMBOL(crc32_le); +EXPORT_SYMBOL(crc32_be); +EXPORT_SYMBOL(bitreverse); +#endif + /* * A brief CRC tutorial. *
-- dwmw2
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