linux/arch/ppc
Steven Rostedt 69be8f1896 [PATCH] convert signal handling of NODEFER to act like other Unix boxes.
It has been reported that the way Linux handles NODEFER for signals is
not consistent with the way other Unix boxes handle it.  I've written a
program to test the behavior of how this flag affects signals and had
several reports from people who ran this on various Unix boxes,
confirming that Linux seems to be unique on the way this is handled.

The way NODEFER affects signals on other Unix boxes is as follows:

1) If NODEFER is set, other signals in sa_mask are still blocked.

2) If NODEFER is set and the signal is in sa_mask, then the signal is
still blocked. (Note: this is the behavior of all tested but Linux _and_
NetBSD 2.0 *).

The way NODEFER affects signals on Linux:

1) If NODEFER is set, other signals are _not_ blocked regardless of
sa_mask (Even NetBSD doesn't do this).

2) If NODEFER is set and the signal is in sa_mask, then the signal being
handled is not blocked.

The patch converts signal handling in all current Linux architectures to
the way most Unix boxes work.

Unix boxes that were tested:  DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU
3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX.

* NetBSD was the only other Unix to behave like Linux on point #2. The
main concern was brought up by point #1 which even NetBSD isn't like
Linux.  So with this patch, we leave NetBSD as the lonely one that
behaves differently here with #2.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-29 10:03:11 -07:00
..
4xx_io Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
8xx_io [PATCH] ppc32: 8xx commproc avoid direct pte manipulation, use dma coherent API instead 2005-08-07 10:00:39 -07:00
8260_io Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
amiga Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
boot [PATCH] ppc32: add 440ep support 2005-08-01 19:14:01 -07:00
configs [PATCH] ppc32: add bamboo defconfig 2005-08-01 19:14:01 -07:00
kernel [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
lib [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
math-emu Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mm [PATCH] ppc32: 8xx avoid icbi misbehaviour in __flush_dcache_icache_phys 2005-07-27 16:34:34 -07:00
oprofile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
platforms [PATCH] Kconfig fix (CONFIG_PM on 44x) 2005-08-23 18:43:43 -07:00
syslib [PATCH] ppc32 8xx: fix m8xx_ide_init() #ifdef 2005-08-26 16:31:46 -07:00
xmon [PATCH] ppc32: Kill embedded system.map, use kallsyms 2005-06-21 18:46:26 -07:00
Kconfig [PATCH] Kconfig fix (CONFIG_PM on 44x) 2005-08-23 18:43:43 -07:00
Kconfig.debug [PATCH] ppc32: Remove FSL OCP support 2005-06-25 16:24:27 -07:00
Makefile [PATCH] ppc32: Add support for Freescale e200 (Book-E) core 2005-06-25 16:24:26 -07:00