Commit 1f40a8bf authored Dec 28, 2014 by Pavel Machek Committed by Ingo Molnar Feb 19, 2015

x86/mm/pat: Ensure different messages in STRICT_DEVMEM and PAT cases

STRICT_DEVMEM and PAT produce same failure accessing /dev/mem,
which is quite confusing to the user. Make printk messages
different to lessen confusion.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 1db491f7

arch/x86/mm/pat.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -628,7 +628,7 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size)

		while (cursor < to) {
		if (!devmem_is_allowed(pfn)) {
		printk(KERN_INFO "Program %s tried to access /dev/mem between [mem %#010Lx-%#010Lx]\n",
		printk(KERN_INFO "Program %s tried to access /dev/mem between [mem %#010Lx-%#010Lx], PAT prevents it\n",
		current->comm, from, to - 1);
		return 0;
		}