Kernel commit <3301bc53358a> ("lib/sbitmap: kill 'depth' from sbitmap_word")
removed the depth member from struct sbitmap_word. Without the patch, the
sbitmapq will fail:
crash> sbitmapq 0xffff8e99d0dc8010
sbitmapq: invalid structure member offset: sbitmap_word_depth
FILE: sbitmap.c LINE: 84 FUNCTION: __sbitmap_weight()
Signed-off-by: Lianbo Jiang <[email protected]>
---
sbitmap.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/sbitmap.c b/sbitmap.c
index 94114efc129e..494a1ba85e75 100644
--- a/sbitmap.c
+++ b/sbitmap.c
@@ -78,10 +78,16 @@ static unsigned long bitmap_weight(unsigned long bitmap,
unsigned int bits)
return w;
}
+static inline unsigned int __map_depth(const struct sbitmap_context *sc, int
index)
+{
+ if (index == sc->map_nr - 1)
+ return sc->depth - (index << sc->shift);
+ return 1U << sc->shift;
+}
+
static unsigned int __sbitmap_weight(const struct sbitmap_context *sc, bool
set)
{
const ulong sbitmap_word_size = SIZE(sbitmap_word);
- const ulong w_depth_off = OFFSET(sbitmap_word_depth);
const ulong w_word_off = OFFSET(sbitmap_word_word);
const ulong w_cleared_off = OFFSET(sbitmap_word_cleared);
@@ -99,7 +105,7 @@ static unsigned int __sbitmap_weight(const struct
sbitmap_context *sc, bool set)
error(FATAL, "cannot read sbitmap_word\n");
}
- depth = ULONG(sbitmap_word_buf + w_depth_off);
+ depth = __map_depth(sc, i);
if (set) {
word = ULONG(sbitmap_word_buf + w_word_off);
@@ -142,7 +148,6 @@ static void sbitmap_emit_byte(unsigned int offset, uint8_t
byte)
static void sbitmap_bitmap_show(const struct sbitmap_context *sc)
{
const ulong sbitmap_word_size = SIZE(sbitmap_word);
- const ulong w_depth_off = OFFSET(sbitmap_word_depth);
const ulong w_word_off = OFFSET(sbitmap_word_word);
const ulong w_cleared_off = OFFSET(sbitmap_word_cleared);
@@ -165,7 +170,7 @@ static void sbitmap_bitmap_show(const struct
sbitmap_context *sc)
word = ULONG(sbitmap_word_buf + w_word_off);
cleared = ULONG(sbitmap_word_buf + w_cleared_off);
- word_bits = ULONG(sbitmap_word_buf + w_depth_off);
+ word_bits = __map_depth(sc, i);
word &= ~cleared;
@@ -213,7 +218,6 @@ static void __sbitmap_for_each_set(const struct
sbitmap_context *sc,
unsigned int start, sbitmap_for_each_fn fn, void *data)
{
const ulong sbitmap_word_size = SIZE(sbitmap_word);
- const ulong w_depth_off = OFFSET(sbitmap_word_depth);
const ulong w_word_off = OFFSET(sbitmap_word_word);
const ulong w_cleared_off = OFFSET(sbitmap_word_cleared);
@@ -232,7 +236,7 @@ static void __sbitmap_for_each_set(const struct
sbitmap_context *sc,
while (scanned < sc->depth) {
unsigned long w_addr = sc->map_addr + (sbitmap_word_size *
index);
- unsigned long w_depth, w_word, w_cleared;
+ unsigned long w_word, w_cleared;
unsigned long word, depth;
if (!readmem(w_addr, KVADDR, sbitmap_word_buf,
sbitmap_word_size, "sbitmap_word", RETURN_ON_ERROR)) {
@@ -240,11 +244,10 @@ static void __sbitmap_for_each_set(const struct
sbitmap_context *sc,
error(FATAL, "cannot read sbitmap_word\n");
}
- w_depth = ULONG(sbitmap_word_buf + w_depth_off);
w_word = ULONG(sbitmap_word_buf + w_word_off);
w_cleared = ULONG(sbitmap_word_buf + w_cleared_off);
- depth = min(w_depth - nr, sc->depth - scanned);
+ depth = min(__map_depth(sc, index) - nr, sc->depth - scanned);
scanned += depth;
word = w_word & ~w_cleared;
--
2.20.1
--
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