From: runet@innovsys•com (Rune Torgersen)
To: <linuxppc-dev@ozlabs•org>
Subject: [PATCH]: Check that TASK_SIZE does not overlap KERNEL_START
Date: Fri, 23 May 2008 10:59:15 -0500 (CDT) [thread overview]
Message-ID: <20080523155915.9ABF15AF36@innovsys.com> (raw)
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 <runet@innovsys•com>
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index fd98ca9..72e0e3f 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -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
next reply other threads:[~2008-05-23 15:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-23 15:59 Rune Torgersen [this message]
2008-05-23 17:55 ` [PATCH]: Check that TASK_SIZE does not overlap KERNEL_START Kumar Gala
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