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blackfin: convert kernel_thread() and kernel_execve() to generic ones

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-10-13 03:22:53 -04:00
parent ddffeb8c4d
commit ee1e17c69e
5 changed files with 27 additions and 109 deletions
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22
arch/blackfin/kernel/entry.S
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@@ -46,22 +46,16 @@ ENTRY(_ret_from_fork)
SP += -12;
pseudo_long_call _schedule_tail, p5;
SP += 12;
r0 = [sp + PT_IPEND];
cc = bittst(r0,1);
if cc jump .Lin_kernel;
p1 = [sp++];
r0 = [sp++];
cc = p1 == 0;
if cc jump .Lfork;
sp += -12;
call (p1);
sp += 12;
.Lfork:
RESTORE_CONTEXT
rti;
.Lin_kernel:
bitclr(r0,1);
[sp + PT_IPEND] = r0;
/* do a 'fake' RTI by jumping to [RETI]
* to avoid clearing supervisor mode in child
*/
r0 = [sp + PT_PC];
[sp + PT_P0] = r0;
RESTORE_ALL_SYS
jump (p0);
ENDPROC(_ret_from_fork)
ENTRY(_sys_vfork)