diff options
| -rw-r--r-- | kernel/printk/printk_ringbuffer.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/printk/printk_ringbuffer.c b/kernel/printk/printk_ringbuffer.c index 88f7dd4cb0c1..11b860ad5264 100644 --- a/kernel/printk/printk_ringbuffer.c +++ b/kernel/printk/printk_ringbuffer.c @@ -412,9 +412,14 @@ static enum desc_state desc_read(struct prb_desc_ring *desc_ring, /* * Copy the descriptor data. The data is not valid until the - * state has been re-checked. + * state has been re-checked. A memcpy() for all of @desc + * cannot be used because of the atomic_t @state_var field. */ - memcpy(desc_out, desc, sizeof(*desc_out)); /* LMM(desc_read:C) */ + memcpy(&desc_out->info, &desc->info, sizeof(desc_out->info)); /* LMM(desc_read:C) */ + memcpy(&desc_out->text_blk_lpos, &desc->text_blk_lpos, + sizeof(desc_out->text_blk_lpos)); /* also part of desc_read:C */ + memcpy(&desc_out->dict_blk_lpos, &desc->dict_blk_lpos, + sizeof(desc_out->dict_blk_lpos)); /* also part of desc_read:C */ /* * 1. Guarantee the descriptor content is loaded before re-checking |