linux-kernel - [PATCH 3/4] UML - Add a debugging message

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Date:	Mon, 05 Mar 2007 17:41:21 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	akpm@...l.org
cc:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: [PATCH 3/4] UML - Add a debugging message

Add a debugging message in the case that mapping a stub fails.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
--
 arch/um/os-Linux/skas/process.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: test/arch/um/os-Linux/skas/process.c
===================================================================
--- test.orig/arch/um/os-Linux/skas/process.c	2007-03-05 15:08:18.000000000 -0500
+++ test/arch/um/os-Linux/skas/process.c	2007-03-05 16:14:56.000000000 -0500
@@ -419,9 +419,12 @@ void map_stub_pages(int fd, unsigned lon
 					  .offset  = code_offset
 	} } });
 	n = os_write_file(fd, &mmop, sizeof(mmop));
-	if(n != sizeof(mmop))
+	if(n != sizeof(mmop)){
+		printk("mmap args - addr = 0x%lx, fd = %d, offset = %llx\n",
+		       code, code_fd, (unsigned long long) code_offset);
 		panic("map_stub_pages : /proc/mm map for code failed, "
 		      "err = %d\n", -n);
+	}
 
 	if ( stack ) {
 		__u64 map_offset;

-
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