ia64: fix module loading for gcc-5.4
authorSergei Trofimovich <slyfox@gentoo.org>
Mon, 1 May 2017 18:51:55 +0000 (11:51 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 1 May 2017 21:59:04 +0000 (14:59 -0700)
commita25fb8508c1b80dce742dbeaa4d75a1e9f2c5617
treeb23f45b1f92f3ec15afc6f276e7b4dd504ada9e7
parent5db6db0d400edd8bec274e34960cfa22838e1df5
ia64: fix module loading for gcc-5.4

Starting from gcc-5.4+ gcc generates MLX instructions in more cases to
refer local symbols:

    https://gcc.gnu.org/PR60465

That caused ia64 module loader to choke on such instructions:

    fuse: invalid slot number 1 for IMM64

The Linux kernel used to handle only case where relocation pointed to
slot=2 instruction in the bundle.  That limitation was fixed in linux by
commit 9c184a073bfd ("[IA64] Fix 2.6 kernel for the new ia64 assembler")
See

    http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433

This change lifts the slot=2 restriction from the kernel module loader.

Tested on 'fuse' and 'btrfs' kernel modules.

Cc: Markus Elfring <elfring@users.sourceforge.net>
Cc: H J Lu <hjl.tools@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Bug: https://bugs.gentoo.org/601014
Tested-by: Émeric MASCHINO <emeric.maschino@gmail.com>
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/ia64/kernel/module.c