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[PATCH] uml: commentary about forking flag

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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>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2005-05-01 08:58:56 -07:00 • committed by Linus Torvalds
parent ffa0aea681
commit acef2e55d2
1 changed files with 4 additions and 0 deletions
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4
include/asm-um/processor-generic.h
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@ -17,6 +17,10 @@ struct task_struct;
struct mm_struct; struct mm_struct;
struct thread_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 forking;
int nsyscalls; int nsyscalls;
struct pt_regs regs; struct pt_regs regs;