From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> Subject: 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@xxxxxxxxxx Link: https://lkml.kernel.org/r/20210608083418.137226-2-wangkefeng.wang@xxxxxxxxxx Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> Cc: Souptick Joarder <jrdr.linux@xxxxxxxxx> Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Cc: Greentime Hu <green.hu@xxxxxxxxx> Cc: Greg Ungerer <gerg@xxxxxxxxxxxxxx> Cc: Guo Ren <guoren@xxxxxxxxxx> Cc: Heiko Carstens <hca@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Jonas Bonn <jonas@xxxxxxxxxxxx> Cc: Ley Foon Tan <ley.foon.tan@xxxxxxxxx> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Cc: Nick Hu <nickhu@xxxxxxxxxxxxx> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx> Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx> Cc: Rich Felker <dalias@xxxxxxxx> Cc: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> Cc: Stafford Horne <shorne@xxxxxxxxx> Cc: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx> Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/mm.h | 3 +++ mm/init-mm.c | 9 +++++++++ 2 files changed, 12 insertions(+) --- a/include/linux/mm.h~mm-add-setup_initial_init_mm-helper +++ a/include/linux/mm.h @@ -238,6 +238,9 @@ int __add_to_page_cache_locked(struct pa #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 --- a/mm/init-mm.c~mm-add-setup_initial_init_mm-helper +++ a/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; +} _
