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Tue, 26 May 2026 20:30:12 -0700 (PDT) From: Wandun Chen To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, kexec@lists.infradead.org, iommu@lists.linux.dev, zhaomeijing@lixiang.com Cc: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, bhe@redhat.com, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, ruirui.yang@linux.dev, m.szyprowski@samsung.com, robin.murphy@arm.com, quic_obabatun@quicinc.com Subject: [PATCH v3 04/11] of: reserved_mem: zero total_reserved_mem_cnt if no valid /reserved-memory entry Date: Wed, 27 May 2026 11:29:10 +0800 Message-ID: <20260527032917.3385849-5-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260527032917.3385849-1-chenwandun1@gmail.com> References: <20260527032917.3385849-1-chenwandun1@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Wandun Chen Prepare for storing /memreserve/ entries in the reserved_mem array. Zero total_reserved_mem_cnt if no valid /reserved-memory entry, instead of keeping it's initial value of MAX_RESERVED_REGIONS, this allows accounting /memreserve entries based on total_reserved_mem_cnt in a follow-up patch. No functional change. Signed-off-by: Wandun Chen --- drivers/of/of_reserved_mem.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 6d479381ff1f..05defc91e901 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -329,11 +329,14 @@ int __init fdt_scan_reserved_mem(void) const void *fdt = initial_boot_params; node = fdt_path_offset(fdt, "/reserved-memory"); - if (node < 0) + if (node < 0) { + total_reserved_mem_cnt = 0; return -ENODEV; + } if (__reserved_mem_check_root(node) != 0) { pr_err("Reserved memory: unsupported node format, ignoring\n"); + total_reserved_mem_cnt = 0; return -EINVAL; } -- 2.43.0