From: H. Peter Anvin Date: Fri, 21 Sep 2012 19:43:06 +0000 (-0700) Subject: x86-32, mm: The WP test should be done on a kernel page X-Git-Tag: v3.7-rc1~166^2~15 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8bd753be7a96443dd5111cb07ed5907a3787c978;p=linux.git x86-32, mm: The WP test should be done on a kernel page PAGE_READONLY includes user permission, but this is a page used exclusively by the kernel; use PAGE_KERNEL_RO instead. Signed-off-by: H. Peter Anvin Link: http://lkml.kernel.org/r/1348256595-29119-3-git-send-email-hpa@linux.intel.com --- diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 575d86f85ce4..e537b351e8ce 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -712,7 +712,7 @@ static void __init test_wp_bit(void) "Checking if this processor honours the WP bit even in supervisor mode..."); /* Any page-aligned address will do, the test is non-destructive */ - __set_fixmap(FIX_WP_TEST, __pa(&swapper_pg_dir), PAGE_READONLY); + __set_fixmap(FIX_WP_TEST, __pa(&swapper_pg_dir), PAGE_KERNEL_RO); boot_cpu_data.wp_works_ok = do_test_wp_bit(); clear_fixmap(FIX_WP_TEST);