diff options
| author | Aleksey Gorelov <Aleksey_Gorelov@Phoenix.com> | 2006-06-27 02:53:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:38 -0700 |
| commit | 4031ff388138b58e5cd472dccce38828bcb8c706 (patch) | |
| tree | f2c88fdcdef3ec9880d23ce271f14e95f7aa1cf5 /arch/powerpc/mm/mmu_decl.h | |
| parent | c723e084606ca1c81e91b80b2c0c44bde7bbc4df (diff) | |
[PATCH] fix broken vm86 interrupt/signal handling
Commit c3ff8ec31c1249d268cd11390649768a12bec1b9 ("[PATCH] i386: Don't
miss pending signals returning to user mode after signal processing")
meant that vm86 interrupt/signal handling got broken for the case when
vm86 is called from kernel space.
In this scenario, if signal is pending because of vm86 interrupt,
do_notify_resume/do_signal exits immediately due to user_mode() check,
without processing any signals. Thus, resume_userspace handler is spinning
in a tight loop with signal pending and TIF_SIGPENDING is set. Previously
everything worked Ok.
No in-tree usage of vm86() from kernel space exists, but I've heard
about a number of projects out there which use vm86 calls from kernel,
one of them being this, for instance:
http://dev.gentoo.org/~spock/projects/vesafb-tng/
The following patch fixes the issue.
Signed-off-by: Aleksey Gorelov <aleksey_gorelov@phoenix.com>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/powerpc/mm/mmu_decl.h')
0 files changed, 0 insertions, 0 deletions