Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=80a68a43d90e2221599b507b6b26c3cba1957687
Commit:     80a68a43d90e2221599b507b6b26c3cba1957687
Parent:     74d99a5e262229ee865f6f68528d10b82471ead6
Author:     Stuart Menefy <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 26 21:16:09 2007 +0900
Committer:  Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 13:18:57 2008 +0900

    sh: Add a printk() to warn legacy mem= growers.
    
    mem= can't be used to grow the size of kernel memory, so provide a
    warning to that effect.
    
    Signed-off-by: Stuart Menefy <[EMAIL PROTECTED]>
    Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
 arch/sh/kernel/setup.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 6891cc9..7eb7fdc 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -84,6 +84,17 @@ static int __init early_parse_mem(char *p)
 
        memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
        size = memparse(p, &p);
+
+       if (size > __MEMORY_SIZE) {
+               static char msg[] __initdata = KERN_ERR
+                       "Using mem= to increase the size of kernel memory "
+                       "is not allowed.\n"
+                       "  Recompile the kernel with the correct value for "
+                       "CONFIG_MEMORY_SIZE.\n";
+               printk(msg);
+               return 0;
+       }
+
        memory_end = memory_start + size;
 
        return 0;
-
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