Commit-ID: 02276a3a677d681f0cd227d7111c71fdbce23832 Gitweb: http://git.kernel.org/tip/02276a3a677d681f0cd227d7111c71fdbce23832 Author: Bryan O'Donoghue <pure.logic@xxxxxxxxxxxxxxxxx> AuthorDate: Wed, 24 Sep 2014 21:26:03 +0100 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Thu, 25 Sep 2014 06:52:15 +0200 x86/intel/quark: Add comment on TLB flush to setup_arch() Quark X1000 requires CR3 to be rewritten to flush TLB entries irrespective of the PGE bits in CR4 or PTE.PGE. Add a comment to setup_arch() to indicate that the code: load_cr3(swapper_pg_dir); __flush_tlb_all(); Will already have flushed the TLB @ the CR3 reload allowing us to skip over a potential if/else for Quark. Signed-off-by: Bryan O'Donoghue <pure.logic@xxxxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1411590363-8052-1-git-send-email-pure.logic@xxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/setup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 41ead8d..e7d7f6e 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -878,6 +878,11 @@ void __init setup_arch(char **cmdline_p) initial_page_table + KERNEL_PGD_BOUNDARY, KERNEL_PGD_PTRS); + /* + * Locate the page directory and flush the TLB. + * On Quark X1000 rewriting CR3 flushes the TLB no if/else is required + * to choose between __flush_tlb() and __flush_tlb_all() + */ load_cr3(swapper_pg_dir); __flush_tlb_all(); #else -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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