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dm bufio: Simplify stack trace retrieval

Browse source 
Replace the indirection through struct stack_trace with an invocation of
the storage array based interface.

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: [email protected]
Cc: Mike Snitzer <[email protected]>
Cc: Alasdair Kergon <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: [email protected]
Cc: David Rientjes <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: [email protected]
Cc: Mike Rapoport <[email protected]>
Cc: Akinobu Mita <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: [email protected]
Cc: Robin Murphy <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Johannes Thumshirn <[email protected]>
Cc: David Sterba <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Josef Bacik <[email protected]>
Cc: [email protected]
Cc: Daniel Vetter <[email protected]>
Cc: [email protected]
Cc: Joonas Lahtinen <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: [email protected]
Cc: David Airlie <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: Tom Zanussi <[email protected]>
Cc: Miroslav Benes <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
This commit is contained in:
Thomas Gleixner 2019-04-25 11:45:07 +02:00
commit 741b58f3e2
1 changed files with 6 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/md/dm-bufio.c
View file

@ -150,7 +150,7 @@ struct dm_buffer {
void (*end_io)(struct dm_buffer *, blk_status_t);
#ifdef CONFIG_DM_DEBUG_BLOCK_STACK_TRACING
#define MAX_STACK 10
struct stack_trace stack_trace;
unsigned int stack_len;
unsigned long stack_entries[MAX_STACK];
#endif
};
@ -232,11 +232,7 @@ static DEFINE_MUTEX(dm_bufio_clients_lock);
#ifdef CONFIG_DM_DEBUG_BLOCK_STACK_TRACING
static void buffer_record_stack(struct dm_buffer *b)
{
b->stack_trace.nr_entries = 0;
b->stack_trace.max_entries = MAX_STACK;
b->stack_trace.entries = b->stack_entries;
b->stack_trace.skip = 2;
save_stack_trace(&b->stack_trace);
b->stack_len = stack_trace_save(b->stack_entries, MAX_STACK, 2);
}
#endif
@ -438,7 +434,7 @@ static struct dm_buffer *alloc_buffer(struct dm_bufio_client *c, gfp_t gfp_mask)
adjust_total_allocated(b->data_mode, (long)c->block_size);
#ifdef CONFIG_DM_DEBUG_BLOCK_STACK_TRACING
memset(&b->stack_trace, 0, sizeof(b->stack_trace));
b->stack_len = 0;
#endif
return b;
}
@ -1520,8 +1516,9 @@ static void drop_buffers(struct dm_bufio_client *c)
DMERR("leaked buffer %llx, hold count %u, list %d",
(unsigned long long)b->block, b->hold_count, i);
#ifdef CONFIG_DM_DEBUG_BLOCK_STACK_TRACING
print_stack_trace(&b->stack_trace, 1);
b->hold_count = 0; /* mark unclaimed to avoid BUG_ON below */
stack_trace_print(b->stack_entries, b->stack_len, 1);
/* mark unclaimed to avoid BUG_ON below */
b->hold_count = 0;
#endif
}