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linux/arch/parisc
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Helge Deller 1e8249b8a4 parisc: Enable -ffunction-sections for modules on 32-bit kernel 
Frank Schreiner reported, that since kernel 4.18 he faces sysfs-warnings
when loading modules on a 32-bit kernel. Here is one such example:

 sysfs: cannot create duplicate filename '/module/nfs/sections/.text'
 CPU: 0 PID: 98 Comm: modprobe Not tainted 4.18.0-2-parisc #1 Debian 4.18.10-2
 Backtrace:
  [<1017ce2c>] show_stack+0x3c/0x50
  [<107a7210>] dump_stack+0x28/0x38
  [<103f900c>] sysfs_warn_dup+0x88/0xac
  [<103f8b1c>] sysfs_add_file_mode_ns+0x164/0x1d0
  [<103f9e70>] internal_create_group+0x11c/0x304
  [<103fa0a0>] sysfs_create_group+0x48/0x60
  [<1022abe8>] load_module.constprop.35+0x1f9c/0x23b8
  [<1022b278>] sys_finit_module+0xd0/0x11c
  [<101831dc>] syscall_exit+0x0/0x14

This warning gets triggered by the fact, that due to commit 24b6c22504
("parisc: Build kernel without -ffunction-sections") we now get multiple .text
sections in the kernel modules for which sysfs_create_group() can't create
multiple virtual files.

This patch works around the problem by re-enabling the -ffunction-sections
compiler option for modules, while keeping it disabled for the non-module
kernel code.

Reported-by: Frank Scheiner <frank.scheiner@web.de>
Fixes: 24b6c22504 ("parisc: Build kernel without -ffunction-sections")
Cc: <stable@vger.kernel.org> # v4.18+
Signed-off-by: Helge Deller <deller@gmx.de>
2018-12-02 20:34:07 +01:00
..
boot parisc: Include compressed vmlinux file in vmlinuz boot kernel 2018-10-17 08:18:01 +02:00
configs net: Remove CONFIG_NETFILTER_DEBUG and _ASSERT() macros. 2017-09-04 13:25:20 +02:00
include Merge branch 'parisc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2018-11-14 13:42:41 -06:00
kernel parisc: Revert "Release spinlocks using ordered store" 2018-11-06 12:03:22 +01:00
lib parisc: Fix and improve kernel stack unwinding 2018-08-13 09:54:17 +02:00
math-emu signal/parisc: Use force_sig_fault where appropriate 2018-04-25 10:44:06 -05:00
mm mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
oprofile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
defpalo.conf parisc: switch to gzip-compressed vmlinuz kernel 2013-07-09 22:09:20 +02:00
install.sh parisc: make "make install" not depend on vmlinux 2013-11-07 22:28:06 +01:00
Kconfig mm: remove CONFIG_HAVE_MEMBLOCK 2018-10-31 08:54:15 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile parisc: Enable -ffunction-sections for modules on 32-bit kernel 2018-12-02 20:34:07 +01:00
nm