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c=relaxed/simple; d=ellerman.id.au; s=201909; t=1596111321; bh=YNSVJAmG6iTLprr4AXeykiRRbuPWau8/ePuc4CoRMGM=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=dDG2HeGveH8jvsO0a3nV+Tp8BcGIZDu65BOPDvIIBo9wVTyiHzeoVy9VEea0rigvp Y31hCYMQ/HUQJyt9f4Ns+ZWd4J0yauoOrKc1q24QkaP65G5RtKXvj8BnxizCtGPCIs 4Qc5Gy9BbRkYcfHS9FaL2IesmCw9kHwdS0i+jJ5INj6RLnsR8z4hMy+N03Q+rveLd0 2v5hfX/mFHnRdxjBR0pUmOS4LXqz54J4KK7TRfoGZVmsUzhhMnBhUvMn3FR8lvfRl/ Ax9t5/4az9jOznaLXvwqANu/Zl8pK6CgRrdLYmMHTgYkBan25IQFsKLy25EXJBUiYn TCPH/khAUMFFQ== From: Michael Ellerman To: Mike Rapoport , Andrew Morton Subject: Re: [PATCH 06/15] powerpc: fadamp: simplify fadump_reserve_crash_area() In-Reply-To: <20200728051153.1590-7-rppt@kernel.org> References: <20200728051153.1590-1-rppt@kernel.org> <20200728051153.1590-7-rppt@kernel.org> Date: Thu, 30 Jul 2020 22:15:13 +1000 Message-ID: <87d04d5hda.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Cc: linux-sh@vger.kernel.org, Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , Hari Bathini , linux-mips@vger.kernel.org, Max Filippov , Paul Mackerras , sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, Will Deacon , Stafford Horne , linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, Yoshinori Sato , x86@kernel.org, Russell King , Mike Rapoport , clang-built-linux@googlegroups.com, Ingo Molnar , Catalin Marinas , uclinux-h8-devel@lists.sourceforge.jp, linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org, Borislav Petkov , Andy Lutomirski , Paul Walmsley , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Michal Simek , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Palmer Dabbelt , Christoph Hellwig , Mike Rapoport X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Mike Rapoport writes: > From: Mike Rapoport > > fadump_reserve_crash_area() reserves memory from a specified base address > till the end of the RAM. > > Replace iteration through the memblock.memory with a single call to > memblock_reserve() with appropriate that will take care of proper memory ^ parameters? > reservation. > > Signed-off-by: Mike Rapoport > --- > arch/powerpc/kernel/fadump.c | 20 +------------------- > 1 file changed, 1 insertion(+), 19 deletions(-) I think this looks OK to me, but I don't have a setup to test it easily. I've added Hari to Cc who might be able to. But I'll give you an ack in the hope that it works :) Acked-by: Michael Ellerman > diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c > index 78ab9a6ee6ac..2446a61e3c25 100644 > --- a/arch/powerpc/kernel/fadump.c > +++ b/arch/powerpc/kernel/fadump.c > @@ -1658,25 +1658,7 @@ int __init fadump_reserve_mem(void) > /* Preserve everything above the base address */ > static void __init fadump_reserve_crash_area(u64 base) > { > - struct memblock_region *reg; > - u64 mstart, msize; > - > - for_each_memblock(memory, reg) { > - mstart = reg->base; > - msize = reg->size; > - > - if ((mstart + msize) < base) > - continue; > - > - if (mstart < base) { > - msize -= (base - mstart); > - mstart = base; > - } > - > - pr_info("Reserving %lluMB of memory at %#016llx for preserving crash data", > - (msize >> 20), mstart); > - memblock_reserve(mstart, msize); > - } > + memblock_reserve(base, memblock_end_of_DRAM() - base); > } > > unsigned long __init arch_reserved_kernel_pages(void) > -- > 2.26.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu