linux-kernel - [PATCH 2/5] CMDLINE: drivers: of: ifdef out cmdline section

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Date:   Wed,  3 Mar 2021 20:47:59 -0800
From:   Daniel Walker <danielwa@...co.com>
To:     Will Deacon <will@...nel.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        ob Herring <robh@...nel.org>,
        Daniel Gimpelevich <daniel@...pelevich.san-francisco.ca.us>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     xe-linux-external@...co.com,
        Ruslan Ruslichenko <rruslich@...co.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/5] CMDLINE: drivers: of: ifdef out cmdline section

It looks like there's some seepage of cmdline stuff into
the generic device tree code. This conflicts with the
generic cmdline implementation so I remove it in the case
when that's enabled.

Cc: xe-linux-external@...co.com
Signed-off-by: Ruslan Ruslichenko <rruslich@...co.com>
Signed-off-by: Daniel Walker <danielwa@...co.com>
---
 drivers/of/fdt.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index feb0f2d67fc5..cfe4f8d3c9f5 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -25,6 +25,7 @@
 #include <linux/serial_core.h>
 #include <linux/sysfs.h>
 #include <linux/random.h>
+#include <linux/cmdline.h>
 
 #include <asm/setup.h>  /* for COMMAND_LINE_SIZE */
 #include <asm/page.h>
@@ -1048,8 +1049,18 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
 
 	early_init_dt_check_for_initrd(node);
 
+#ifdef CONFIG_GENERIC_CMDLINE
 	/* Retrieve command line */
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
+
+	/*
+	 * The builtin command line will be added here, or it can override
+	 * with the DT bootargs.
+	 */
+	cmdline_add_builtin(data,
+			    ((p != NULL && l > 0) ? p : NULL), /* This is sanity checking */
+			    COMMAND_LINE_SIZE);
+#else
 	if (p != NULL && l > 0)
 		strlcpy(data, p, min(l, COMMAND_LINE_SIZE));
 
@@ -1070,6 +1081,7 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
 		strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #endif
 #endif /* CONFIG_CMDLINE */
+#endif /* CONFIG_GENERIC_CMDLINE */
 
 	pr_debug("Command line is: %s\n", (char *)data);
 
-- 
2.25.1