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authorOlof Johansson <olof@lixom.net>2012-09-16 18:50:30 -0700
committerOlof Johansson <olof@lixom.net>2012-09-16 18:50:30 -0700
commitd192f93cfca6a0aedbf10fa548d8bc17b86275d6 (patch)
tree357a4106ec49747bd78550a79d68f7b6d1f642a3 /arch/alpha/kernel/process.c
parentadcb079f28ec08165897e2450a4a60b219274008 (diff)
parentd5703bd35a4c76b0717ea51e2e8aabce341828a1 (diff)
Merge tag 'tegra-for-3.7-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/maintainers
* tag 'tegra-for-3.7-maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra: MAINTAINERS: tegra: remove Olof/Colin, add device tree files MAINTAINERS: add defconfig file to TEGRA section + sync with 3.6-rc4
Diffstat (limited to 'arch/alpha/kernel/process.c')
-rw-r--r--arch/alpha/kernel/process.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 153d3fce3e8..d6fde98b74b 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -455,3 +455,22 @@ get_wchan(struct task_struct *p)
}
return pc;
}
+
+int kernel_execve(const char *path, const char *const argv[], const char *const envp[])
+{
+ /* Avoid the HAE being gratuitously wrong, which would cause us
+ to do the whole turn off interrupts thing and restore it. */
+ struct pt_regs regs = {.hae = alpha_mv.hae_cache};
+ int err = do_execve(path, argv, envp, &regs);
+ if (!err) {
+ struct pt_regs *p = current_pt_regs();
+ /* copy regs to normal position and off to userland we go... */
+ *p = regs;
+ __asm__ __volatile__ (
+ "mov %0, $sp;"
+ "br $31, ret_from_sys_call"
+ : : "r"(p));
+ }
+ return err;
+}
+EXPORT_SYMBOL(kernel_execve);