linux/arch/um
Paolo 'Blaisorblade' Giarrusso 1feb8d2d73 [PATCH] uml: workaround host bug in "TT mode vs. NPTL link fix"
A big bug has been diagnosed on hosts running the SKAS patch and built with
CONFIG_REGPARM, due to some missing prevent_tail_call().

On these hosts, this workaround is needed to avoid triggering that bug,
because "to" is kept by GCC only in EBX, which is corrupted at the return of
mmap2().

Since to trigger this bug int 0x80 must be used when doing the call, it rarely
manifests itself, so I'd prefer to get this merged to workaround that host
bug, since it should cause no functional change.  Still, you might prefer to
drop it, I'll leave this to you.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-14 09:00:24 -07:00
..
drivers [PATCH] uml: remove winch sem 2005-07-07 18:23:44 -07:00
include [PATCH] uml: Proper clone support for skas0 2005-07-07 18:23:44 -07:00
kernel [PATCH] uml: Proper clone support for skas0 2005-07-07 18:23:44 -07:00
os-Linux [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
scripts [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
sys-i386 [PATCH] uml: workaround host bug in "TT mode vs. NPTL link fix" 2005-07-14 09:00:24 -07:00
sys-ia64 Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys-ppc [PATCH] uml: stack dump fix 2005-05-28 16:46:13 -07:00
sys-x86_64 [PATCH] uml: workaround host bug in "TT mode vs. NPTL link fix" 2005-07-14 09:00:24 -07:00
util [PATCH] uml: cross-build support : mk_task and mk_constants 2005-05-05 16:36:35 -07:00
config.release Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
defconfig [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
Kconfig [NET]: add a top-level Networking menu to *config 2005-07-11 21:03:49 -07:00
Kconfig_char [PATCH] uml: make the emulated iomem driver work on 2.6 2005-06-08 16:21:11 -07:00
Kconfig_i386 [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
Kconfig_net Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig_scsi Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig_x86_64 [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
Kconfig.debug [PATCH] uml: split CONFIG_FRAME_POINTER from DEBUG_INFO 2005-05-28 16:46:13 -07:00
Makefile [PATCH] uml:remove user_constants.h on clean 2005-07-12 16:01:00 -07:00
Makefile-i386 [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00
Makefile-ia64 Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-os-Linux Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-ppc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-skas Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-tt Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile-x86_64 [PATCH] uml: skas0 - separate kernel address space on stock hosts 2005-07-07 18:23:44 -07:00