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Tue, 08 Jun 2021 07:53:50 -0700 (PDT) MIME-Version: 1.0 References: <20210608083418.137226-1-wangkefeng.wang@huawei.com> <20210608083418.137226-2-wangkefeng.wang@huawei.com> In-Reply-To: <20210608083418.137226-2-wangkefeng.wang@huawei.com> From: Souptick Joarder Date: Tue, 8 Jun 2021 20:23:38 +0530 Message-ID: Subject: Re: [PATCH v3 resend 01/15] mm: add setup_initial_init_mm() helper To: Kefeng Wang Cc: Andrew Morton , linux-kernel@vger.kernel.org, Linux-MM , linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-s390@vger.kernel.org, X86 ML Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=rU2pKJ75; spf=pass (imf20.hostedemail.com: domain of jrdrlinux@gmail.com designates 209.85.217.48 as permitted sender) smtp.mailfrom=jrdrlinux@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Stat-Signature: 47gryuc6iaru7czw1kg193ddddzm1smk X-Rspamd-Queue-Id: E4E1E37E X-Rspamd-Server: rspam06 X-HE-Tag: 1623164026-823679 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jun 8, 2021 at 1:56 PM Kefeng Wang wrote: > > 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 > --- > include/linux/mm.h | 3 +++ > mm/init-mm.c | 9 +++++++++ > 2 files changed, 12 insertions(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index c274f75efcf9..02aa057540b7 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -244,6 +244,9 @@ 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); > + Gentle query -> is there any limitation to add inline functions in setup_arch() functions ? > /* > * 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; > +} > -- > 2.26.2 > >