linux/arch/sh
Linus Torvalds 221af7f87b Split 'flush_old_exec' into two functions
'flush_old_exec()' is the point of no return when doing an execve(), and
it is pretty badly misnamed.  It doesn't just flush the old executable
environment, it also starts up the new one.

Which is very inconvenient for things like setting up the new
personality, because we want the new personality to affect the starting
of the new environment, but at the same time we do _not_ want the new
personality to take effect if flushing the old one fails.

As a result, the x86-64 '32-bit' personality is actually done using this
insane "I'm going to change the ABI, but I haven't done it yet" bit
(TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
personality, but just the "pending" bit, so that "flush_thread()" can do
the actual personality magic.

This patch in no way changes any of that insanity, but it does split the
'flush_old_exec()' function up into a preparatory part that can fail
(still called flush_old_exec()), and a new part that will actually set
up the new exec environment (setup_new_exec()).  All callers are changed
to trivially comply with the new world order.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-29 08:22:01 -08:00
..
boards sh: ms7724: Correct sh-eth EEPROM polling timeout. 2010-01-18 20:47:15 +09:00
boot sh: include empty zero page in romImage 2009-12-04 16:26:20 +09:00
cchips sh: mach-hp6xx: Fix up the hp6xx build for hd64461 changes. 2009-05-20 11:27:13 +09:00
configs sh: update defconfigs. 2010-01-04 15:38:50 +09:00
drivers sh: move machtypes.h to include/generated 2009-12-12 13:08:14 +01:00
include sh64: wire up sys_accept4. 2010-01-19 17:00:31 +09:00
kernel Split 'flush_old_exec' into two functions 2010-01-29 08:22:01 -08:00
lib sh: Optimised memset for SH4 2009-11-24 16:28:43 +09:00
lib64 sh64: Kill off special clear_page() implementation. 2009-08-04 17:17:00 +09:00
math-emu sh: Minor optimisations to FPU handling 2009-11-24 17:45:38 +09:00
mm sh: Don't default enable PMB support. 2010-01-04 11:16:33 +09:00
oprofile sh: oprofile: Fix up count size mismatch for common impl. 2009-11-05 17:13:15 +09:00
tools Makefile: do not override LC_CTYPE 2010-01-13 13:27:24 +01:00
Kconfig sh: Only provide a PCLK definition for legacy CPG CPUs. 2009-12-29 11:09:30 +09:00
Kconfig.cpu sh: Tidy up SH-4A boot_cpu_data.flags probing. 2009-06-01 19:50:08 +09:00
Kconfig.debug sh: Remove old early serial console code V2 2009-12-15 12:07:35 +09:00
Makefile sh: move machtypes.h to include/generated 2009-12-12 13:08:14 +01:00