diff options
| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2005-05-01 08:58:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-01 08:58:56 -0700 |
| commit | acef2e55d2a1b59bb5610cacc546c1d1b5de2dc9 (patch) | |
| tree | 2cb120173dc5ea968bfd035d2433caa316c5b820 /include/asm-um | |
| parent | ffa0aea681a5f3c8aecbb86f1cfd3486043805de (diff) | |
| download | lwn-acef2e55d2a1b59bb5610cacc546c1d1b5de2dc9.tar.gz lwn-acef2e55d2a1b59bb5610cacc546c1d1b5de2dc9.zip | |
[PATCH] uml: commentary about forking flag
Add some commentary about UML internals, for a strange trick.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-um')
| -rw-r--r-- | include/asm-um/processor-generic.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-um/processor-generic.h b/include/asm-um/processor-generic.h index 4d9404989b5a..b953b1ad3b02 100644 --- a/include/asm-um/processor-generic.h +++ b/include/asm-um/processor-generic.h @@ -17,6 +17,10 @@ struct task_struct; struct mm_struct; struct thread_struct { + /* This flag is set to 1 before calling do_fork (and analyzed in + * copy_thread) to mark that we are begin called from userspace (fork / + * vfork / clone), and reset to 0 after. It is left to 0 when called + * from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */ int forking; int nsyscalls; struct pt_regs regs; |