linux-kernel - [PATCH 09/12] platform/early: add an init section for early driver data

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Message-Id: <20180511162028.20616-10-brgl@bgdev.pl>
Date:   Fri, 11 May 2018 18:20:25 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Sekhar Nori <nsekhar@...com>, Kevin Hilman <khilman@...nel.org>,
        David Lechner <david@...hnology.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Marc Zyngier <marc.zyngier@....com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Peter Rosin <peda@...ntia.se>, Jiri Slaby <jslaby@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Johan Hovold <johan@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arch@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 09/12] platform/early: add an init section for early driver data

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Provide a separate section in which pointers to early platform driver
structs will be stored.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 include/asm-generic/vmlinux.lds.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index af240573e482..6b5205f30ef2 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -214,6 +214,16 @@
 #define CPU_METHOD_OF_TABLES()	OF_TABLE(CONFIG_SMP, cpu_method)
 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 
+#ifdef CONFIG_EARLY_PLATFORM
+#define EARLY_PLATFORM_DRIVERS_TABLE()					\
+	. = ALIGN(8);							\
+	VMLINUX_SYMBOL(__early_platform_drivers_table) = .;		\
+	KEEP(*(__early_platform_drivers_table))				\
+	VMLINUX_SYMBOL(__early_platform_drivers_table_end) = .;
+#else
+#define EARLY_PLATFORM_DRIVERS_TABLE()
+#endif
+
 #ifdef CONFIG_ACPI
 #define ACPI_PROBE_TABLE(name)						\
 	. = ALIGN(8);							\
@@ -593,6 +603,7 @@
 	RESERVEDMEM_OF_TABLES()						\
 	TIMER_OF_TABLES()						\
 	IOMMU_OF_TABLES()						\
+	EARLY_PLATFORM_DRIVERS_TABLE()					\
 	CPU_METHOD_OF_TABLES()						\
 	CPUIDLE_METHOD_OF_TABLES()					\
 	KERNEL_DTB()							\
-- 
2.17.0