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m68knommu: fix early setup to not access variables

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The early setup code for the ColdFire 53xx platform accesses variables
before the RAM and other system initialization steps may have taken place.
Currently it has 2 global variables that will end up in the bss section
that are accessed during this early setup. There is a special static RAM
stack setup at this time, but not necessarily the RAM where kernel data
sections will end up.

Even on system setups where RAM is setup by a boot loader the access
to the early setup variables is before the BSS section has been initialized.
This can potentially corrupt a ram loaded root filesystem that sits in that
memory area before it has been moved.

These 2 variables are not used at all after being set, and can just be
removed.

Reported-by: Christian Gieseler <christiangieseler@yahoo.de>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
This commit is contained in:
Greg Ungerer 2016-08-23 16:29:43 +10:00
parent 08895a8b6b
commit bc065e4784
1 changed files with 2 additions and 6 deletions
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8
arch/m68k/coldfire/m53xx.c
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@ -271,9 +271,6 @@ void __init config_BSP(char *commandp, int size)
#define NAND_FLASH_ADDRESS (0xD0000000)
int sys_clk_khz = 0;
int sys_clk_mhz = 0;
void wtm_init(void);
void scm_init(void);
void gpio_init(void);
@ -286,9 +283,8 @@ int get_sys_clock (void);
asmlinkage void __init sysinit(void)
{
sys_clk_khz = clock_pll(0, 0);
sys_clk_mhz = sys_clk_khz/1000;
clock_pll(0, 0);
wtm_init();
scm_init();
gpio_init();