Commit 1b2614f1 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'akpm' (patches from Andrew) 

Merge more fixes from Andrew Morton:
 "6 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  scripts/dtc: fix '%zx' warning
  include/linux/compiler.h: don't perform compiletime_assert with -O0
  mm, madvise: ensure poisoned pages are removed from per-cpu lists
  mm, uprobes: fix multiple free of ->uprobes_state.xol_area
  kernel/kthread.c: kthread_worker: don't hog the cpu
  mm,page_alloc: don't call __node_reclaim() with oom_lock held.
parents ea25c431 e6618692

include/linux/compiler.h

+5 −1
Original line number Diff line number Diff line
@@ -517,6 +517,7 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s 
# define __compiletime_error_fallback(condition) do { } while (0)

#endif



#ifdef __OPTIMIZE__

# define __compiletime_assert(condition, msg, prefix, suffix)		\

	do {								\

		bool __cond = !(condition);				\
@@ -525,6 +526,9 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s 
			prefix ## suffix();				\

		__compiletime_error_fallback(__cond);			\

	} while (0)

#else

# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)

#endif



#define _compiletime_assert(condition, msg, prefix, suffix) \

	__compiletime_assert(condition, msg, prefix, suffix)

kernel/events/uprobes.c

+0 −2
Original line number Diff line number Diff line
@@ -1262,8 +1262,6 @@ void uprobe_end_dup_mmap(void) 


void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)

{

	newmm->uprobes_state.xol_area = NULL;



	if (test_bit(MMF_HAS_UPROBES, &oldmm->flags)) {

		set_bit(MMF_HAS_UPROBES, &newmm->flags);

		/* unconditionally, dup_mmap() skips VM_DONTCOPY vmas */

kernel/fork.c

+8 −0
Original line number Diff line number Diff line
@@ -785,6 +785,13 @@ static void mm_init_owner(struct mm_struct *mm, struct task_struct *p) 
#endif

}



static void mm_init_uprobes_state(struct mm_struct *mm)

{

#ifdef CONFIG_UPROBES

	mm->uprobes_state.xol_area = NULL;

#endif

}



static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,

	struct user_namespace *user_ns)

{
@@ -812,6 +819,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p, 
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS

	mm->pmd_huge_pte = NULL;

#endif

	mm_init_uprobes_state(mm);



	if (current->mm) {

		mm->flags = current->mm->flags & MMF_INIT_MASK;

kernel/kthread.c

+1 −0
Original line number Diff line number Diff line
@@ -637,6 +637,7 @@ repeat: 
		schedule();



	try_to_freeze();

	cond_resched();

	goto repeat;

}

EXPORT_SYMBOL_GPL(kthread_worker_fn);

mm/madvise.c

+6 −0
Original line number Diff line number Diff line
@@ -613,6 +613,7 @@ static int madvise_inject_error(int behavior, 
		unsigned long start, unsigned long end)

{

	struct page *page;

	struct zone *zone;



	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;
@@ -646,6 +647,11 @@ static int madvise_inject_error(int behavior, 
		if (ret)

			return ret;

	}



	/* Ensure that all poisoned pages are removed from per-cpu lists */

	for_each_populated_zone(zone)

		drain_all_pages(zone);



	return 0;

}

#endif

CRA Git | Maintained and supported by SUSTech CRA and CCSE