On 2021/6/7 5:31, Mike Rapoport wrote:

Hello Kefeng,

On Fri, Jun 04, 2021 at 03:06:19PM +0800, Kefeng Wang wrote:

quoted

Add setup_initial_init_mm() helper to setup kernel text,
data and brk.

Cc: linux-snps-arc@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-csky@vger.kernel.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-m68k@lists.linux-m68k.org
Cc: openrisc@lists.librecores.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-sh@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: x86@kernel.org
Signed-off-by: Kefeng Wang <redacted>
---
  include/linux/mm_types.h | 8 ++++++++
  1 file changed, 8 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5aacc1c10a45..e1d2429089a4 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h

@@ -572,6 +572,14 @@ struct mm_struct {
  };
  
  extern struct mm_struct init_mm;
+static inline void setup_initial_init_mm(void *start_code, void *end_code,
+					 void *end_data, void *brk)

I think it's not that performance sensitive to make it inline. It can be
placed in mm/init-mm.c with a forward declaration in mm.h

Ok, I will send a update one with this change.

quoted

+{
+	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;
+}

quoted

  /* Pointer magic because the dynamic array size confuses some compilers. */
  static inline void mm_init_cpumask(struct mm_struct *mm)
-- 
2.26.2


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