From: Andrey Ryabinin <[email protected]> Commit 8170e6bed465 ("x86, 64bit: Use a #PF handler to materialize early mappings on demand") introduced clear_page(init_level4_pgt); call in x86_64_start_kernel(). However, this clear_page is useless because init_level4_page already filled with zeroes in head_64.S
Commit message in 8170e6bed465 says that this clear_page() was dropped in v7, but it accidentally reappeared in later versions of that patchset. Signed-off-by: Andrey Ryabinin <[email protected]> --- arch/x86/kernel/head64.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 5a46681..6a6eefd 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -177,7 +177,6 @@ asmlinkage __visible void __init x86_64_start_kernel(char * real_mode_data) */ load_ucode_bsp(); - clear_page(init_level4_pgt); /* set init_level4_pgt kernel high mapping*/ init_level4_pgt[511] = early_level4_pgt[511]; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
