diff options
| author | Andy Lutomirski <luto@kernel.org> | 2017-05-28 10:00:16 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-06-05 09:59:44 +0200 |
| commit | be4ffc0d787fafb22b89a2f29e71fea3b119205e (patch) | |
| tree | 59a360545756d7a14c4422b5d81652ab20de2080 /arch/x86/mm/tlb.c | |
| parent | 3d28ebceaffab40f30afa87e33331560148d7b8b (diff) | |
x86/mm: Be more consistent wrt PAGE_SHIFT vs PAGE_SIZE in tlb flush code
Nadav pointed out that some code used PAGE_SIZE and other code used
PAGE_SHIFT. Use PAGE_SHIFT instead of multiplying or dividing by
PAGE_SIZE.
Requested-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/tlb.c')
| -rw-r--r-- | arch/x86/mm/tlb.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 44db82013f1c..2a5e851f2035 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -220,8 +220,7 @@ static void flush_tlb_func_common(const struct flush_tlb_info *f, trace_tlb_flush(reason, TLB_FLUSH_ALL); } else { unsigned long addr; - unsigned long nr_pages = - (f->end - f->start) / PAGE_SIZE; + unsigned long nr_pages = (f->end - f->start) >> PAGE_SHIFT; addr = f->start; while (addr < f->end) { __flush_tlb_single(addr); @@ -351,7 +350,7 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end) /* Balance as user space task's flush, a bit conservative */ if (end == TLB_FLUSH_ALL || - (end - start) > tlb_single_page_flush_ceiling * PAGE_SIZE) { + (end - start) > tlb_single_page_flush_ceiling << PAGE_SHIFT) { on_each_cpu(do_flush_tlb_all, NULL, 1); } else { struct flush_tlb_info info; |