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-rw-r--r--include/linux/efi.h8
-rw-r--r--include/linux/kthread.h1
-rw-r--r--include/linux/kvm_host.h8
-rw-r--r--include/linux/mlx5/driver.h12
-rw-r--r--include/linux/mm.h8
-rw-r--r--include/linux/mtd/map.h2
-rw-r--r--include/linux/mtd/rawnand.h16
-rw-r--r--include/linux/oom.h2
-rw-r--r--include/linux/percpu-rwsem.h6
-rw-r--r--include/linux/rbtree_augmented.h1
-rw-r--r--include/linux/rbtree_latch.h1
-rw-r--r--include/linux/rwsem.h6
-rw-r--r--include/linux/sched.h50
-rw-r--r--include/linux/sched/signal.h2
14 files changed, 88 insertions, 35 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h
index f1b7d68ac460..3016d8c456bc 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -395,8 +395,8 @@ typedef struct {
u32 attributes;
u32 get_bar_attributes;
u32 set_bar_attributes;
- uint64_t romsize;
- void *romimage;
+ u64 romsize;
+ u32 romimage;
} efi_pci_io_protocol_32;
typedef struct {
@@ -415,8 +415,8 @@ typedef struct {
u64 attributes;
u64 get_bar_attributes;
u64 set_bar_attributes;
- uint64_t romsize;
- void *romimage;
+ u64 romsize;
+ u64 romimage;
} efi_pci_io_protocol_64;
typedef struct {
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index c1961761311d..2803264c512f 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -62,6 +62,7 @@ void *kthread_probe_data(struct task_struct *k);
int kthread_park(struct task_struct *k);
void kthread_unpark(struct task_struct *k);
void kthread_parkme(void);
+void kthread_park_complete(struct task_struct *k);
int kthreadd(void *unused);
extern struct task_struct *kthreadd_task;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6930c63126c7..6d6e79c59e68 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1045,13 +1045,7 @@ static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
-#ifdef CONFIG_S390
-#define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
-#elif defined(CONFIG_ARM64)
-#define KVM_MAX_IRQ_ROUTES 4096
-#else
-#define KVM_MAX_IRQ_ROUTES 1024
-#endif
+#define KVM_MAX_IRQ_ROUTES 4096 /* might need extension/rework in the future */
bool kvm_arch_can_set_irq_routing(struct kvm *kvm);
int kvm_set_irq_routing(struct kvm *kvm,
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 2a156c5dfadd..d703774982ca 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1286,17 +1286,7 @@ enum {
static inline const struct cpumask *
mlx5_get_vector_affinity_hint(struct mlx5_core_dev *dev, int vector)
{
- struct irq_desc *desc;
- unsigned int irq;
- int eqn;
- int err;
-
- err = mlx5_vector2eqn(dev, vector, &eqn, &irq);
- if (err)
- return NULL;
-
- desc = irq_to_desc(irq);
- return desc->affinity_hint;
+ return dev->priv.irq_info[vector].mask;
}
#endif /* MLX5_DRIVER_H */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1ac1f06a4be6..c6fa9a255dbf 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2466,6 +2466,13 @@ static inline vm_fault_t vmf_insert_pfn(struct vm_area_struct *vma,
return VM_FAULT_NOPAGE;
}
+static inline vm_fault_t vmf_error(int err)
+{
+ if (err == -ENOMEM)
+ return VM_FAULT_OOM;
+ return VM_FAULT_SIGBUS;
+}
+
struct page *follow_page_mask(struct vm_area_struct *vma,
unsigned long address, unsigned int foll_flags,
unsigned int *page_mask);
@@ -2493,6 +2500,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma,
#define FOLL_MLOCK 0x1000 /* lock present pages */
#define FOLL_REMOTE 0x2000 /* we are working on non-current tsk/mm */
#define FOLL_COW 0x4000 /* internal GUP flag */
+#define FOLL_ANON 0x8000 /* don't do file mappings */
static inline int vm_fault_to_errno(int vm_fault, int foll_flags)
{
diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index b5b43f94f311..01b990e4b228 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -312,7 +312,7 @@ void map_destroy(struct mtd_info *mtd);
({ \
int i, ret = 1; \
for (i = 0; i < map_words(map); i++) { \
- if (((val1).x[i] & (val2).x[i]) != (val2).x[i]) { \
+ if (((val1).x[i] & (val2).x[i]) != (val3).x[i]) { \
ret = 0; \
break; \
} \
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 5dad59b31244..17c919436f48 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -867,12 +867,18 @@ struct nand_op_instr {
* tBERS (during an erase) which all of them are u64 values that cannot be
* divided by usual kernel macros and must be handled with the special
* DIV_ROUND_UP_ULL() macro.
+ *
+ * Cast to type of dividend is needed here to guarantee that the result won't
+ * be an unsigned long long when the dividend is an unsigned long (or smaller),
+ * which is what the compiler does when it sees ternary operator with 2
+ * different return types (picks the largest type to make sure there's no
+ * loss).
*/
-#define __DIVIDE(dividend, divisor) ({ \
- sizeof(dividend) == sizeof(u32) ? \
- DIV_ROUND_UP(dividend, divisor) : \
- DIV_ROUND_UP_ULL(dividend, divisor); \
- })
+#define __DIVIDE(dividend, divisor) ({ \
+ (__typeof__(dividend))(sizeof(dividend) <= sizeof(unsigned long) ? \
+ DIV_ROUND_UP(dividend, divisor) : \
+ DIV_ROUND_UP_ULL(dividend, divisor)); \
+ })
#define PSEC_TO_NSEC(x) __DIVIDE(x, 1000)
#define PSEC_TO_MSEC(x) __DIVIDE(x, 1000000000)
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 5bad038ac012..6adac113e96d 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -95,6 +95,8 @@ static inline int check_stable_address_space(struct mm_struct *mm)
return 0;
}
+void __oom_reap_task_mm(struct mm_struct *mm);
+
extern unsigned long oom_badness(struct task_struct *p,
struct mem_cgroup *memcg, const nodemask_t *nodemask,
unsigned long totalpages);
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index b1f37a89e368..79b99d653e03 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -133,7 +133,7 @@ static inline void percpu_rwsem_release(struct percpu_rw_semaphore *sem,
lock_release(&sem->rw_sem.dep_map, 1, ip);
#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
if (!read)
- sem->rw_sem.owner = NULL;
+ sem->rw_sem.owner = RWSEM_OWNER_UNKNOWN;
#endif
}
@@ -141,6 +141,10 @@ static inline void percpu_rwsem_acquire(struct percpu_rw_semaphore *sem,
bool read, unsigned long ip)
{
lock_acquire(&sem->rw_sem.dep_map, 0, 1, read, 1, NULL, ip);
+#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
+ if (!read)
+ sem->rw_sem.owner = current;
+#endif
}
#endif
diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h
index 6bfd2b581f75..af8a61be2d8d 100644
--- a/include/linux/rbtree_augmented.h
+++ b/include/linux/rbtree_augmented.h
@@ -26,6 +26,7 @@
#include <linux/compiler.h>
#include <linux/rbtree.h>
+#include <linux/rcupdate.h>
/*
* Please note - only struct rb_augment_callbacks and the prototypes for
diff --git a/include/linux/rbtree_latch.h b/include/linux/rbtree_latch.h
index ece43e882b56..7d012faa509a 100644
--- a/include/linux/rbtree_latch.h
+++ b/include/linux/rbtree_latch.h
@@ -35,6 +35,7 @@
#include <linux/rbtree.h>
#include <linux/seqlock.h>
+#include <linux/rcupdate.h>
struct latch_tree_node {
struct rb_node node[2];
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 56707d5ff6ad..ab93b6eae696 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -44,6 +44,12 @@ struct rw_semaphore {
#endif
};
+/*
+ * Setting bit 0 of the owner field with other non-zero bits will indicate
+ * that the rwsem is writer-owned with an unknown owner.
+ */
+#define RWSEM_OWNER_UNKNOWN ((struct task_struct *)-1L)
+
extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
extern struct rw_semaphore *rwsem_down_read_failed_killable(struct rw_semaphore *sem);
extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b3d697f3b573..c2413703f45d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -112,17 +112,36 @@ struct task_group;
#ifdef CONFIG_DEBUG_ATOMIC_SLEEP
+/*
+ * Special states are those that do not use the normal wait-loop pattern. See
+ * the comment with set_special_state().
+ */
+#define is_special_task_state(state) \
+ ((state) & (__TASK_STOPPED | __TASK_TRACED | TASK_DEAD))
+
#define __set_current_state(state_value) \
do { \
+ WARN_ON_ONCE(is_special_task_state(state_value));\
current->task_state_change = _THIS_IP_; \
current->state = (state_value); \
} while (0)
+
#define set_current_state(state_value) \
do { \
+ WARN_ON_ONCE(is_special_task_state(state_value));\
current->task_state_change = _THIS_IP_; \
smp_store_mb(current->state, (state_value)); \
} while (0)
+#define set_special_state(state_value) \
+ do { \
+ unsigned long flags; /* may shadow */ \
+ WARN_ON_ONCE(!is_special_task_state(state_value)); \
+ raw_spin_lock_irqsave(&current->pi_lock, flags); \
+ current->task_state_change = _THIS_IP_; \
+ current->state = (state_value); \
+ raw_spin_unlock_irqrestore(&current->pi_lock, flags); \
+ } while (0)
#else
/*
* set_current_state() includes a barrier so that the write of current->state
@@ -144,8 +163,8 @@ struct task_group;
*
* The above is typically ordered against the wakeup, which does:
*
- * need_sleep = false;
- * wake_up_state(p, TASK_UNINTERRUPTIBLE);
+ * need_sleep = false;
+ * wake_up_state(p, TASK_UNINTERRUPTIBLE);
*
* Where wake_up_state() (and all other wakeup primitives) imply enough
* barriers to order the store of the variable against wakeup.
@@ -154,12 +173,33 @@ struct task_group;
* once it observes the TASK_UNINTERRUPTIBLE store the waking CPU can issue a
* TASK_RUNNING store which can collide with __set_current_state(TASK_RUNNING).
*
- * This is obviously fine, since they both store the exact same value.
+ * However, with slightly different timing the wakeup TASK_RUNNING store can
+ * also collide with the TASK_UNINTERRUPTIBLE store. Loosing that store is not
+ * a problem either because that will result in one extra go around the loop
+ * and our @cond test will save the day.
*
* Also see the comments of try_to_wake_up().
*/
-#define __set_current_state(state_value) do { current->state = (state_value); } while (0)
-#define set_current_state(state_value) smp_store_mb(current->state, (state_value))
+#define __set_current_state(state_value) \
+ current->state = (state_value)
+
+#define set_current_state(state_value) \
+ smp_store_mb(current->state, (state_value))
+
+/*
+ * set_special_state() should be used for those states when the blocking task
+ * can not use the regular condition based wait-loop. In that case we must
+ * serialize against wakeups such that any possible in-flight TASK_RUNNING stores
+ * will not collide with our state change.
+ */
+#define set_special_state(state_value) \
+ do { \
+ unsigned long flags; /* may shadow */ \
+ raw_spin_lock_irqsave(&current->pi_lock, flags); \
+ current->state = (state_value); \
+ raw_spin_unlock_irqrestore(&current->pi_lock, flags); \
+ } while (0)
+
#endif
/* Task command name length: */
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index a7ce74c74e49..113d1ad1ced7 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -280,7 +280,7 @@ static inline void kernel_signal_stop(void)
{
spin_lock_irq(&current->sighand->siglock);
if (current->jobctl & JOBCTL_STOP_DEQUEUED)
- __set_current_state(TASK_STOPPED);
+ set_special_state(TASK_STOPPED);
spin_unlock_irq(&current->sighand->siglock);
schedule();
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-21 13:46:47 +0000