summaryrefslogtreecommitdiff
path: root/include/linux/sched
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 13:55:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 13:55:34 -0700
commit6cad420cc695867b4ca710bac21fde21a4102e4b (patch)
tree890d42abc1e82c2cf5cef583584f88ca70116ce9 /include/linux/sched
parent7be97138e7276c71cc9ad1752dcb502d28f4400d (diff)
parent77d6b9094819ba55353de0ef92957f3f54f2c36c (diff)
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: "A large amount of MM, plenty more to come. Subsystems affected by this patch series: - tools - kthread - kbuild - scripts - ocfs2 - vfs - mm: slub, kmemleak, pagecache, gup, swap, memcg, pagemap, mremap, sparsemem, kasan, pagealloc, vmscan, compaction, mempolicy, hugetlbfs, hugetlb" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (155 commits) include/linux/huge_mm.h: check PageTail in hpage_nr_pages even when !THP mm/hugetlb: fix build failure with HUGETLB_PAGE but not HUGEBTLBFS selftests/vm: fix map_hugetlb length used for testing read and write mm/hugetlb: remove unnecessary memory fetch in PageHeadHuge() mm/hugetlb.c: clean code by removing unnecessary initialization hugetlb_cgroup: add hugetlb_cgroup reservation docs hugetlb_cgroup: add hugetlb_cgroup reservation tests hugetlb: support file_region coalescing again hugetlb_cgroup: support noreserve mappings hugetlb_cgroup: add accounting for shared mappings hugetlb: disable region_add file_region coalescing hugetlb_cgroup: add reservation accounting for private mappings mm/hugetlb_cgroup: fix hugetlb_cgroup migration hugetlb_cgroup: add interface for charge/uncharge hugetlb reservations hugetlb_cgroup: add hugetlb_cgroup reservation counter hugetlbfs: Use i_mmap_rwsem to address page fault/truncate race hugetlbfs: use i_mmap_rwsem for more pmd sharing synchronization mm/memblock.c: remove redundant assignment to variable max_addr mm: mempolicy: require at least one nodeid for MPOL_PREFERRED mm: mempolicy: use VM_BUG_ON_VMA in queue_pages_test_walk() ...
Diffstat (limited to 'include/linux/sched')
-rw-r--r--include/linux/sched/signal.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index a29df79540ce..3e5b090c16d4 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -10,6 +10,8 @@
#include <linux/cred.h>
#include <linux/refcount.h>
#include <linux/posix-timers.h>
+#include <linux/mm_types.h>
+#include <asm/ptrace.h>
/*
* Types defining task->signal and task->sighand and APIs using them:
@@ -377,6 +379,20 @@ static inline int signal_pending_state(long state, struct task_struct *p)
}
/*
+ * This should only be used in fault handlers to decide whether we
+ * should stop the current fault routine to handle the signals
+ * instead, especially with the case where we've got interrupted with
+ * a VM_FAULT_RETRY.
+ */
+static inline bool fault_signal_pending(vm_fault_t fault_flags,
+ struct pt_regs *regs)
+{
+ return unlikely((fault_flags & VM_FAULT_RETRY) &&
+ (fatal_signal_pending(current) ||
+ (user_mode(regs) && signal_pending(current))));
+}
+
+/*
* Reevaluate whether the task has signals pending delivery.
* Wake the task if so.
* This is required every time the blocked sigset_t changes.