linux-kernel - [PATCH v4 0/4] MIPS: Modify mem= and memmap= parameter

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Message-Id: <1646108941-27919-1-git-send-email-yangtiezhu@loongson.cn>
Date:   Tue,  1 Mar 2022 12:28:57 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Xuefeng Li <lixuefeng@...ngson.cn>, linux-mips@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/4] MIPS: Modify mem= and memmap= parameter

In the current code, the kernel command-line parameter mem= and memmap=
can not work well on MIPS, this patchset refactors the related code to
fix them.

For kdump on MIPS, if the users want to limit the memory region for the
capture kernel to avoid corrupting the memory image of the panic kernel,
use the parameter memmap=limit@...e is the proper way, I will submit a
patch to use memmap=limit@...e for kexec-tools after this patchset is
applied.

v4: Fix some build warnings reported by kernel test robot

v3: Modify patch #3 to maintain compatibility for memmap=limit{$,#,!}base,
    commented by Mike Rapoport, thank you

v2: Add some new patches to support memmap=limit@...e

Tiezhu Yang (4):
  MIPS: Refactor early_parse_mem() to fix mem= parameter
  memblock: Introduce memblock_mem_range_remove_map()
  MIPS: Refactor early_parse_memmap() to fix memmap= parameter
  MIPS: Remove not used variable usermem

 arch/mips/kernel/setup.c | 69 ++++++++++++++++++++++--------------------------
 include/linux/memblock.h |  1 +
 mm/memblock.c            |  9 +++++--
 3 files changed, 40 insertions(+), 39 deletions(-)

-- 
2.1.0