Commit 3d5787c9 authored Aug 31, 2012 by Heiko Carstens Committed by Martin Schwidefsky Sep 26, 2012

s390/mm: change default addressing mode



Change the default addressing mode so that user space runs in primary space
and the kernel runs in home space.
In addition remove the "switch_amode" kernel parameter so all users who
already specified they want the new default behaviour will stay in the
"switched" mode instead of in the opposite they intended.
If there is a need to switch addressing modes, this can be done with the
"user_mode" kernel parameter: user_mode=home

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent c5e3acd6

arch/s390/kernel/setup.c

+1 −11

Original line number	Diff line number	Diff line
		@@ -302,7 +302,7 @@ static int __init parse_vmalloc(char *arg)
		}
		early_param("vmalloc", parse_vmalloc);

		unsigned int addressing_mode = HOME_SPACE_MODE;
		unsigned int addressing_mode = PRIMARY_SPACE_MODE;
		EXPORT_SYMBOL_GPL(addressing_mode);

		static int set_amode_primary(void)
		@@ -323,16 +323,6 @@ static int set_amode_primary(void)
		}
		}

		/*
		* Switch kernel/user addressing modes?
		*/
		static int __init early_parse_switch_amode(char *p)
		{
		addressing_mode = PRIMARY_SPACE_MODE;
		return 0;
		}
		early_param("switch_amode", early_parse_switch_amode);

		static int __init early_parse_user_mode(char *p)
		{
		if (p && strcmp(p, "primary") == 0)