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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-10 21:28:25 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-12 13:35:07 -0400 |
| commit | a74fb73c12398b250fdc5e333a11e15a9e3a84fc (patch) | |
| tree | 2bec2f6e20320f5a4bc01d1e19d7190842ef1c37 /arch | |
| parent | fb45550d76bb584857cf0ea3be79fa78207a3cff (diff) | |
| download | lwn-a74fb73c12398b250fdc5e333a11e15a9e3a84fc.tar.gz lwn-a74fb73c12398b250fdc5e333a11e15a9e3a84fc.zip | |
infrastructure for saner ret_from_kernel_thread semantics
* allow kernel_execve() leave the actual return to userland to
caller (selected by CONFIG_GENERIC_KERNEL_EXECVE). Callers
updated accordingly.
* architecture that does select GENERIC_KERNEL_EXECVE in its
Kconfig should have its ret_from_kernel_thread() do this:
call schedule_tail
call the callback left for it by copy_thread(); if it ever
returns, that's because it has just done successful kernel_execve()
jump to return from syscall
IOW, its only difference from ret_from_fork() is that it does call the
callback.
* such an architecture should also get rid of ret_from_kernel_execve()
and __ARCH_WANT_KERNEL_EXECVE
This is the last part of infrastructure patches in that area - from
that point on work on different architectures can live independently.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index d397e11d167d..d27efb9bfafd 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -261,6 +261,9 @@ config ARCH_WANT_OLD_COMPAT_IPC config GENERIC_KERNEL_THREAD bool +config GENERIC_KERNEL_EXECVE + bool + config HAVE_ARCH_SECCOMP_FILTER bool help |