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h44mr3991753eda.276.1562856731827; Thu, 11 Jul 2019 07:52:11 -0700 (PDT) Received: from ziggy.stardust ([37.223.141.54]) by smtp.gmail.com with ESMTPSA id m31sm1682163edd.42.2019.07.11.07.52.10 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2019 07:52:11 -0700 (PDT) Subject: Re: [PATCH] arm64/kexec: Use consistent convention of initializing 'kxec_buf.mem' with KEXEC_BUF_MEM_UNKNOWN To: Bhupesh Sharma , linux-arm-kernel@lists.infradead.org Cc: will.deacon@arm.com, linux-kernel@vger.kernel.org, takahiro.akashi@linaro.org, james.morse@arm.com, bhupesh.linux@gmail.com References: <1562846252-7441-1-git-send-email-bhsharma@redhat.com> From: Matthias Brugger Openpgp: preference=signencrypt Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa 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Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1562846252-7441-1-git-send-email-bhsharma@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/07/2019 13:57, Bhupesh Sharma wrote: > With commit b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()"), > we introduced the KEXEC_BUF_MEM_UNKNOWN macro. If kexec_buf.mem is set > to this value, kexec_locate_mem_hole() will try to allocate free memory. > > While other arch(s) like s390 and x86_64 already use this macro to > initialize kexec_buf.mem with, arm64 uses an equivalent value of 0. > Replace it with KEXEC_BUF_MEM_UNKNOWN, to keep the convention of > initializing 'kxec_buf.mem' consistent across various archs. > > Cc: takahiro.akashi@linaro.org > Cc: james.morse@arm.com > Cc: will.deacon@arm.com > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Bhupesh Sharma > --- Reviewed-by: Matthias Brugger > arch/arm64/kernel/kexec_image.c | 2 +- > arch/arm64/kernel/machine_kexec_file.c | 4 ++-- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c > index 2514fd6f12cb..29a9428486a5 100644 > --- a/arch/arm64/kernel/kexec_image.c > +++ b/arch/arm64/kernel/kexec_image.c > @@ -84,7 +84,7 @@ static void *image_load(struct kimage *image, > > kbuf.buffer = kernel; > kbuf.bufsz = kernel_len; > - kbuf.mem = 0; > + kbuf.mem = KEXEC_BUF_MEM_UNKNOWN; > kbuf.memsz = le64_to_cpu(h->image_size); > text_offset = le64_to_cpu(h->text_offset); > kbuf.buf_align = MIN_KIMG_ALIGN; > diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c > index 58871333737a..ba78ee7ca990 100644 > --- a/arch/arm64/kernel/machine_kexec_file.c > +++ b/arch/arm64/kernel/machine_kexec_file.c > @@ -177,7 +177,7 @@ int load_other_segments(struct kimage *image, > if (initrd) { > kbuf.buffer = initrd; > kbuf.bufsz = initrd_len; > - kbuf.mem = 0; > + kbuf.mem = KEXEC_BUF_MEM_UNKNOWN; > kbuf.memsz = initrd_len; > kbuf.buf_align = 0; > /* within 1GB-aligned window of up to 32GB in size */ > @@ -204,7 +204,7 @@ int load_other_segments(struct kimage *image, > dtb_len = fdt_totalsize(dtb); > kbuf.buffer = dtb; > kbuf.bufsz = dtb_len; > - kbuf.mem = 0; > + kbuf.mem = KEXEC_BUF_MEM_UNKNOWN; > kbuf.memsz = dtb_len; > /* not across 2MB boundary */ > kbuf.buf_align = SZ_2M; >