]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[PATCH] Process Events: Fix biarch compatibility issue. use __u64 timestamp
authorChandra Seetharaman <sekharan@us.ibm.com>
Sun, 30 Jul 2006 10:03:04 +0000 (03:03 -0700)
committerLinus Torvalds <torvalds@g5.osdl.org>
Mon, 31 Jul 2006 20:28:36 +0000 (13:28 -0700)
commit822cfbff2ef49a08d1b9618d50f81b475d4f936c
tree9b8bd37b3940410a13d0c439cc585d5aea1147ac
parent2ccb48ebb4de139eef4fcefd5f2bb823cb0d81b9
[PATCH] Process Events: Fix biarch compatibility issue. use __u64 timestamp

Events sent by Process Events Connector from a 64-bit kernel are not binary
compatible with a 32-bit userspace program because the "timestamp" field
(struct timespec) is not arch independent.  This affects the fields that
follow "timestamp" as they will be be off by 8 bytes.

This is a problem for 32-bit userspace programs running with 64-bit kernels
on ppc64, s390, x86-64..  any "biarch" system.

Matt had submitted a different solution to lkml as an RFC earlier.  We have
since switched to a solution recommended by Evgeniy Polyakov.

This patch fixes the problem by changing the timestamp to be a __u64, which
stores the number of nanoseconds.

Tested on a x86_64 system with both 32 bit application and 64 bit
application and on a i386 system.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/connector/cn_proc.c
include/linux/cn_proc.h