MIPS: Setup boot_command_line before plat_mem_setup

Web:        https://git.kernel.org/torvalds/c/8ce355cf2e38afdb364d03d12b23d9cf44c3b7f1
Commit:     8ce355cf2e38afdb364d03d12b23d9cf44c3b7f1
Parent:     7a01c19007ad3c7de15d6d8d712e01f40eeed55a
Refname:    refs/heads/master
Author:     Paul Burton <[email protected]>
AuthorDate: Tue Jan 16 16:47:57 2018 +0100
Committer:  James Hogan <[email protected]>
CommitDate: Thu Jan 18 22:06:07 2018 +0000

    MIPS: Setup boot_command_line before plat_mem_setup
    
    Platforms using DT will typically call __dt_setup_arch from
    plat_mem_setup. This in turn calls early_init_dt_scan. When
    CONFIG_CMDLINE is set, this leads to its value being copied into
    boot_command_line by early_init_dt_scan_chosen. If this happens before
    the code setting up boot_command_line in arch_mem_init runs, that code
    will go on to append CONFIG_CMDLINE (via builtin_cmdline) to
    boot_command_line again, duplicating it. For some command line
    parameters (eg. earlycon) this can be a problem. Set up
    boot_command_line before early_init_dt_scan_chosen gets called such that
    it will not write CONFIG_CMDLINE in this scenario & the arguments aren't
    duplicated.
    
    Signed-off-by: Paul Burton <[email protected]>
    Acked-by: Mathieu Malaterre <[email protected]>
    Cc: Ralf Baechle <[email protected]>
    Cc: Maarten ter Huurne <[email protected]>
    Cc: [email protected]
    Patchwork: https://patchwork.linux-mips.org/patch/18483/
    Signed-off-by: James Hogan <[email protected]>
---
 arch/mips/kernel/setup.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 702c678de116..85bc601e9a0d 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -826,25 +826,6 @@ static void __init arch_mem_init(char **cmdline_p)
 	struct memblock_region *reg;
 	extern void plat_mem_setup(void);
 
-	/* call board setup routine */
-	plat_mem_setup();
-
-	/*
-	 * Make sure all kernel memory is in the maps.  The "UP" and
-	 * "DOWN" are opposite for initdata since if it crosses over
-	 * into another memory section you don't want that to be
-	 * freed when the initdata is freed.
-	 */
-	arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
-			 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
-			 BOOT_MEM_RAM);
-	arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
-			 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
-			 BOOT_MEM_INIT_RAM);
-
-	pr_info("Determined physical RAM map:\n");
-	print_memory_map();
-
 #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE)
 	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
 #else
@@ -872,6 +853,26 @@ static void __init arch_mem_init(char **cmdline_p)
 	}
 #endif
 #endif
+
+	/* call board setup routine */
+	plat_mem_setup();
+
+	/*
+	 * Make sure all kernel memory is in the maps.  The "UP" and
+	 * "DOWN" are opposite for initdata since if it crosses over
+	 * into another memory section you don't want that to be
+	 * freed when the initdata is freed.
+	 */
+	arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
+			 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
+			 BOOT_MEM_RAM);
+	arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
+			 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
+			 BOOT_MEM_INIT_RAM);
+
+	pr_info("Determined physical RAM map:\n");
+	print_memory_map();
+
 	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 
 	*cmdline_p = command_line;
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html