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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2018-08-31 11:42:24 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-10-09 12:20:55 +0300
commit53c99bd665a2649341ed6aed358ab56a3eedcd00 (patch)
treeb7fb2be29c66039b6f986f988e064bfdff7dd392 /include
parent00e9e6645adc2c02c9ec5b42fd39d2a7f0880e6a (diff)
downloadlinux-53c99bd665a2649341ed6aed358ab56a3eedcd00.tar.xz
init: add arch_call_rest_init to allow stack switching
With CONFIG_VMAP_STACK=y the kernel stack of all tasks should be allocated in the vmalloc space. The initial stack used for all the early init code is in the init_thread_union. To be able to switch from this early stack to a properly allocated stack from vmalloc the architecture needs a switch-over point. Introduce the arch_call_rest_init() function with a weak definition in init/main.c with the only purpose to call rest_init() from the end of start_kernel(). The architecture override can then do the necessary magic to switch to the new vmalloc'ed stack. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/start_kernel.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/start_kernel.h b/include/linux/start_kernel.h
index 4b268d86a784..8b369a41c03c 100644
--- a/include/linux/start_kernel.h
+++ b/include/linux/start_kernel.h
@@ -9,5 +9,7 @@
up something else. */
extern asmlinkage void __init start_kernel(void);
+extern void __init arch_call_rest_init(void);
+extern void __ref rest_init(void);
#endif /* _LINUX_START_KERNEL_H */