: Check that TASK_SIZE does not overlap KERNEL_START

PATCH In review Rune Torgersen 2 participants 2 messages May 23, 2008

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Rune Torgersen

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2008-05-23 15:58 UTC #0 lore raw

PATCH 1/1 : Check that TASK_SIZE does not overlap KERNEL_START

Make sure CONFIG_TASK_SIZE does not overlap CONFIG_KERNEL_START This could happen when overriding settings to get 1GB lowmem, and would lead to userland mysteriousely hanging.

This setting is only used by PPC32.

Signed-off-by Rune Torgersen <[email protected]>

include/asm-powerpc/processor.h +4 -0

index fd98ca9..72e0e3f 100644
@@ -81,6 +81,10 @@ extern struct task_struct *last_task_used_altivec;
 extern struct task_struct *last_task_used_spe;
 
 #ifdef CONFIG_PPC32
+
+#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
+#error User TASK_SIZE overlaps with KERNEL_START address
+#endif
 #define TASK_SIZE	(CONFIG_TASK_SIZE)
 
 /* This decides where the kernel will search for a free chunk of vm

Kumar Gala

Acked-by on v1 1/1

2008-05-23 17:56 UTC #1 lore raw

Quoted 7 lines · Rune Torgersen

Make sure CONFIG_TASK_SIZE does not overlap CONFIG_KERNEL_START This could happen when overriding settings to get 1GB lowmem, and would lead to userland mysteriousely hanging.
This setting is only used by PPC32.
Signed-off-by Rune Torgersen <[email protected]>

you seem to have lost a colon.

Acked-by Kumar Gala <[email protected]>

- k