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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-09 09:34:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-09 09:34:49 +0200 |
| commit | 725d0123dfff3d7b666cf57f5d29c50addfc99d3 (patch) | |
| tree | 12ec63b2c3965033f30185b4b2f5f12039a9a242 /lib | |
| parent | mcb: Delete num_cells variable which is not required (diff) | |
| parent | Linux 4.6-rc7 (diff) | |
| download | linux-725d0123dfff3d7b666cf57f5d29c50addfc99d3.tar.xz linux-725d0123dfff3d7b666cf57f5d29c50addfc99d3.zip | |
Merge 4.6-rc7 into char-misc-testing
This resolves a merge issue with drivers/hv/ring_buffer.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/stackdepot.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 654c9d87e83a..53ad6c0831ae 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -42,12 +42,14 @@ #define DEPOT_STACK_BITS (sizeof(depot_stack_handle_t) * 8) +#define STACK_ALLOC_NULL_PROTECTION_BITS 1 #define STACK_ALLOC_ORDER 2 /* 'Slab' size order for stack depot, 4 pages */ #define STACK_ALLOC_SIZE (1LL << (PAGE_SHIFT + STACK_ALLOC_ORDER)) #define STACK_ALLOC_ALIGN 4 #define STACK_ALLOC_OFFSET_BITS (STACK_ALLOC_ORDER + PAGE_SHIFT - \ STACK_ALLOC_ALIGN) -#define STACK_ALLOC_INDEX_BITS (DEPOT_STACK_BITS - STACK_ALLOC_OFFSET_BITS) +#define STACK_ALLOC_INDEX_BITS (DEPOT_STACK_BITS - \ + STACK_ALLOC_NULL_PROTECTION_BITS - STACK_ALLOC_OFFSET_BITS) #define STACK_ALLOC_SLABS_CAP 1024 #define STACK_ALLOC_MAX_SLABS \ (((1LL << (STACK_ALLOC_INDEX_BITS)) < STACK_ALLOC_SLABS_CAP) ? \ @@ -59,6 +61,7 @@ union handle_parts { struct { u32 slabindex : STACK_ALLOC_INDEX_BITS; u32 offset : STACK_ALLOC_OFFSET_BITS; + u32 valid : STACK_ALLOC_NULL_PROTECTION_BITS; }; }; @@ -136,6 +139,7 @@ static struct stack_record *depot_alloc_stack(unsigned long *entries, int size, stack->size = size; stack->handle.slabindex = depot_index; stack->handle.offset = depot_offset >> STACK_ALLOC_ALIGN; + stack->handle.valid = 1; memcpy(stack->entries, entries, size * sizeof(unsigned long)); depot_offset += required_size; @@ -210,10 +214,6 @@ depot_stack_handle_t depot_save_stack(struct stack_trace *trace, goto fast_exit; hash = hash_stack(trace->entries, trace->nr_entries); - /* Bad luck, we won't store this stack. */ - if (hash == 0) - goto exit; - bucket = &stack_table[hash & STACK_HASH_MASK]; /* |