asoc-tlv320aic31xx-fix-gpio1-register-definition.patch
alsa-hda-drop-useless-warn_on.patch
alsa-hda-fix-headset-mic-detection-issue-on-a-dell-machine.patch
+x86-vm86-32-switch-to-flush_tlb_mm_range-in-mark_screen_rdonly.patch
+x86-mm-remove-flush_tlb-and-flush_tlb_current_task.patch
+x86-mm-make-flush_tlb_mm_range-more-predictable.patch
--- /dev/null
+From ce27374fabf553153c3f53efcaa9bfab9216bd8c Mon Sep 17 00:00:00 2001
+From: Andy Lutomirski <luto@kernel.org>
+Date: Sat, 22 Apr 2017 00:01:21 -0700
+Subject: x86/mm: Make flush_tlb_mm_range() more predictable
+
+From: Andy Lutomirski <luto@kernel.org>
+
+commit ce27374fabf553153c3f53efcaa9bfab9216bd8c upstream.
+
+I'm about to rewrite the function almost completely, but first I
+want to get a functional change out of the way. Currently, if
+flush_tlb_mm_range() does not flush the local TLB at all, it will
+never do individual page flushes on remote CPUs. This seems to be
+an accident, and preserving it will be awkward. Let's change it
+first so that any regressions in the rewrite will be easier to
+bisect and so that the rewrite can attempt to change no visible
+behavior at all.
+
+The fix is simple: we can simply avoid short-circuiting the
+calculation of base_pages_to_flush.
+
+As a side effect, this also eliminates a potential corner case: if
+tlb_single_page_flush_ceiling == TLB_FLUSH_ALL, flush_tlb_mm_range()
+could have ended up flushing the entire address space one page at a
+time.
+
+Signed-off-by: Andy Lutomirski <luto@kernel.org>
+Acked-by: Dave Hansen <dave.hansen@intel.com>
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Cc: Borislav Petkov <bp@alien8.de>
+Cc: Brian Gerst <brgerst@gmail.com>
+Cc: Denys Vlasenko <dvlasenk@redhat.com>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Josh Poimboeuf <jpoimboe@redhat.com>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Michal Hocko <mhocko@suse.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>
+Link: http://lkml.kernel.org/r/4b29b771d9975aad7154c314534fec235618175a.1492844372.git.luto@kernel.org
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Cc: Hugh Dickins <hughd@google.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/mm/tlb.c | 12 +++++++-----
+ 1 file changed, 7 insertions(+), 5 deletions(-)
+
+--- a/arch/x86/mm/tlb.c
++++ b/arch/x86/mm/tlb.c
+@@ -307,6 +307,12 @@ void flush_tlb_mm_range(struct mm_struct
+ unsigned long base_pages_to_flush = TLB_FLUSH_ALL;
+
+ preempt_disable();
++
++ if ((end != TLB_FLUSH_ALL) && !(vmflag & VM_HUGETLB))
++ base_pages_to_flush = (end - start) >> PAGE_SHIFT;
++ if (base_pages_to_flush > tlb_single_page_flush_ceiling)
++ base_pages_to_flush = TLB_FLUSH_ALL;
++
+ if (current->active_mm != mm) {
+ /* Synchronize with switch_mm. */
+ smp_mb();
+@@ -323,15 +329,11 @@ void flush_tlb_mm_range(struct mm_struct
+ goto out;
+ }
+
+- if ((end != TLB_FLUSH_ALL) && !(vmflag & VM_HUGETLB))
+- base_pages_to_flush = (end - start) >> PAGE_SHIFT;
+-
+ /*
+ * Both branches below are implicit full barriers (MOV to CR or
+ * INVLPG) that synchronize with switch_mm.
+ */
+- if (base_pages_to_flush > tlb_single_page_flush_ceiling) {
+- base_pages_to_flush = TLB_FLUSH_ALL;
++ if (base_pages_to_flush == TLB_FLUSH_ALL) {
+ count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
+ local_flush_tlb();
+ } else {
--- /dev/null
+From 29961b59a51f8c6838a26a45e871a7ed6771809b Mon Sep 17 00:00:00 2001
+From: Andy Lutomirski <luto@kernel.org>
+Date: Sat, 22 Apr 2017 00:01:20 -0700
+Subject: x86/mm: Remove flush_tlb() and flush_tlb_current_task()
+
+From: Andy Lutomirski <luto@kernel.org>
+
+commit 29961b59a51f8c6838a26a45e871a7ed6771809b upstream.
+
+I was trying to figure out what how flush_tlb_current_task() would
+possibly work correctly if current->mm != current->active_mm, but I
+realized I could spare myself the effort: it has no callers except
+the unused flush_tlb() macro.
+
+Signed-off-by: Andy Lutomirski <luto@kernel.org>
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Cc: Borislav Petkov <bp@alien8.de>
+Cc: Brian Gerst <brgerst@gmail.com>
+Cc: Dave Hansen <dave.hansen@intel.com>
+Cc: Denys Vlasenko <dvlasenk@redhat.com>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Josh Poimboeuf <jpoimboe@redhat.com>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Michal Hocko <mhocko@suse.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>
+Link: http://lkml.kernel.org/r/e52d64c11690f85e9f1d69d7b48cc2269cd2e94b.1492844372.git.luto@kernel.org
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Cc: Hugh Dickins <hughd@google.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/include/asm/tlbflush.h | 9 ---------
+ arch/x86/mm/tlb.c | 17 -----------------
+ 2 files changed, 26 deletions(-)
+
+--- a/arch/x86/include/asm/tlbflush.h
++++ b/arch/x86/include/asm/tlbflush.h
+@@ -205,7 +205,6 @@ static inline void __flush_tlb_one(unsig
+ /*
+ * TLB flushing:
+ *
+- * - flush_tlb() flushes the current mm struct TLBs
+ * - flush_tlb_all() flushes all processes TLBs
+ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+@@ -237,11 +236,6 @@ static inline void flush_tlb_all(void)
+ __flush_tlb_all();
+ }
+
+-static inline void flush_tlb(void)
+-{
+- __flush_tlb_up();
+-}
+-
+ static inline void local_flush_tlb(void)
+ {
+ __flush_tlb_up();
+@@ -303,14 +297,11 @@ static inline void flush_tlb_kernel_rang
+ flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
+
+ extern void flush_tlb_all(void);
+-extern void flush_tlb_current_task(void);
+ extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
+ extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
+ unsigned long end, unsigned long vmflag);
+ extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+
+-#define flush_tlb() flush_tlb_current_task()
+-
+ void native_flush_tlb_others(const struct cpumask *cpumask,
+ struct mm_struct *mm,
+ unsigned long start, unsigned long end);
+--- a/arch/x86/mm/tlb.c
++++ b/arch/x86/mm/tlb.c
+@@ -287,23 +287,6 @@ void native_flush_tlb_others(const struc
+ smp_call_function_many(cpumask, flush_tlb_func, &info, 1);
+ }
+
+-void flush_tlb_current_task(void)
+-{
+- struct mm_struct *mm = current->mm;
+-
+- preempt_disable();
+-
+- count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
+-
+- /* This is an implicit full barrier that synchronizes with switch_mm. */
+- local_flush_tlb();
+-
+- trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL);
+- if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids)
+- flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL);
+- preempt_enable();
+-}
+-
+ /*
+ * See Documentation/x86/tlb.txt for details. We choose 33
+ * because it is large enough to cover the vast majority (at
--- /dev/null
+From 9ccee2373f0658f234727700e619df097ba57023 Mon Sep 17 00:00:00 2001
+From: Andy Lutomirski <luto@kernel.org>
+Date: Sat, 22 Apr 2017 00:01:19 -0700
+Subject: x86/vm86/32: Switch to flush_tlb_mm_range() in mark_screen_rdonly()
+
+From: Andy Lutomirski <luto@kernel.org>
+
+commit 9ccee2373f0658f234727700e619df097ba57023 upstream.
+
+mark_screen_rdonly() is the last remaining caller of flush_tlb().
+flush_tlb_mm_range() is potentially faster and isn't obsolete.
+
+Compile-tested only because I don't know whether software that uses
+this mechanism even exists.
+
+Signed-off-by: Andy Lutomirski <luto@kernel.org>
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Cc: Borislav Petkov <bp@alien8.de>
+Cc: Brian Gerst <brgerst@gmail.com>
+Cc: Dave Hansen <dave.hansen@intel.com>
+Cc: Denys Vlasenko <dvlasenk@redhat.com>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Josh Poimboeuf <jpoimboe@redhat.com>
+Cc: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Michal Hocko <mhocko@suse.com>
+Cc: Nadav Amit <namit@vmware.com>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Cc: Rik van Riel <riel@redhat.com>
+Cc: Sasha Levin <sasha.levin@oracle.com>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Link: http://lkml.kernel.org/r/791a644076fc3577ba7f7b7cafd643cc089baa7d.1492844372.git.luto@kernel.org
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Cc: Hugh Dickins <hughd@google.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/kernel/vm86_32.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/x86/kernel/vm86_32.c
++++ b/arch/x86/kernel/vm86_32.c
+@@ -191,7 +191,7 @@ static void mark_screen_rdonly(struct mm
+ pte_unmap_unlock(pte, ptl);
+ out:
+ up_write(&mm->mmap_sem);
+- flush_tlb();
++ flush_tlb_mm_range(mm, 0xA0000, 0xA0000 + 32*PAGE_SIZE, 0UL);
+ }
+
+
projects / thirdparty / kernel / stable-queue.git / commitdiff
