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authorKefeng Wang <wangkefeng.wang@huawei.com>2021-07-07 18:08:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-08 11:48:21 -0700
commit5748fbc533a32459582535b759887c45ca0fe556 (patch)
treea04c9be297694677f5ef7aaa99ed3eba2ab59381
parent06c8839815ac7aa2b44ea3bb3ee1820b08418f55 (diff)
mm: add setup_initial_init_mm() helper
Patch series "init_mm: cleanup ARCH's text/data/brk setup code", v3. Add setup_initial_init_mm() helper, then use it to cleanup the text, data and brk setup code. This patch (of 15): Add setup_initial_init_mm() helper to setup kernel text, data and brk. Link: https://lkml.kernel.org/r/20210608083418.137226-1-wangkefeng.wang@huawei.com Link: https://lkml.kernel.org/r/20210608083418.137226-2-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Souptick Joarder <jrdr.linux@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nick Hu <nickhu@andestech.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Rich Felker <dalias@libc.org> Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mm.h3
-rw-r--r--mm/init-mm.c9
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 788a0b1323d0..57453dba41b9 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -238,6 +238,9 @@ int __add_to_page_cache_locked(struct page *page, struct address_space *mapping,
#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))
+void setup_initial_init_mm(void *start_code, void *end_code,
+ void *end_data, void *brk);
+
/*
* Linux kernel virtual memory manager primitives.
* The idea being to have a "virtual" mm in the same way
diff --git a/mm/init-mm.c b/mm/init-mm.c
index 153162669f80..b4a6f38fb51d 100644
--- a/mm/init-mm.c
+++ b/mm/init-mm.c
@@ -40,3 +40,12 @@ struct mm_struct init_mm = {
.cpu_bitmap = CPU_BITS_NONE,
INIT_MM_CONTEXT(init_mm)
};
+
+void setup_initial_init_mm(void *start_code, void *end_code,
+ void *end_data, void *brk)
+{
+ init_mm.start_code = (unsigned long)start_code;
+ init_mm.end_code = (unsigned long)end_code;
+ init_mm.end_data = (unsigned long)end_data;
+ init_mm.brk = (unsigned long)brk;
+}