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authorAl Viro <viro@zeniv.linux.org.uk>2012-09-16 18:06:34 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2012-10-01 06:44:44 +0200
commitd878d6dacee2c862f02da20f7fa3e2c0e8820e71 (patch)
treec594e7cc3d49e2af55f6fe9706a2fc618dc3f150 /virt/kvm
parentm68k: split ret_from_fork(), simplify kernel_thread() (diff)
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m68k: switch to generic sys_execve()/kernel_execve()
The tricky part here is that task_pt_regs() on m68k works *only* for process inside do_signal(). However, we need something much simpler - pt_regs of a process inside do_signal() may be at different offsets from the stack bottom, depending on the way we'd entered the kernel, but for a task inside sys_execve() it *is* at constant offset. Moreover, for a kernel thread about to become a userland process the same location is also fine - setting sp to that will leave the kernel stack pointer at the very bottom of the kernel stack when we finally switch to userland. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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