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| author | Meijing Zhao <zhaomeijing@lixiang.com> | 2026-09-02 15:59:44 +0800 |
|---|---|---|
| committer | Mike Rapoport (Microsoft) <rppt@kernel.org> | 2026-09-09 20:26:42 +0300 |
| commit | e2d5b01f878d76bd1142e512a0b979a1d3cd0abf (patch) | |
| tree | b5bb0e0a390b2b7ed64b9193ab376004fce18946 | |
| parent | cee9395acd8043be0644b25c34bfa86623f2b935 (diff) | |
| download | linux-e2d5b01f878d76bd1142e512a0b979a1d3cd0abf.tar.gz linux-e2d5b01f878d76bd1142e512a0b979a1d3cd0abf.zip | |
mm: memblock: show all region flags in debugfs
Commit 493f349e38d0 ("memblock: Add flags and nid info in memblock
debugfs") made memblock_debug_show() stop after finding the first set
flag. A memblock region can carry multiple flags, so the remaining flags
are hidden from debugfs.
Walk all bits in the region flags and print every set flag separated by
"|". Keep walking beyond flagname[] so that a set flag without a known
name is reported as UNKNOWN rather than silently ignored.
Fixes: 493f349e38d0 ("memblock: Add flags and nid info in memblock debugfs")
Signed-off-by: Meijing Zhao <zhaomeijing@lixiang.com>
Link: https://patch.msgid.link/20260902075944.3742866-1-zhaomeijing100@gmail.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
| -rw-r--r-- | mm/memblock.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index 9ce86349a29f..021db49eb7fc 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -2908,14 +2908,18 @@ static int memblock_debug_show(struct seq_file *m, void *private) else seq_printf(m, "%4c ", 'x'); if (reg->flags) { - for (j = 0; j < count; j++) { - if (reg->flags & (1U << j)) { - seq_printf(m, "%s\n", flagname[j]); - break; - } + unsigned int flags = reg->flags; + bool first = true; + + for (j = 0; flags; j++, flags >>= 1) { + if (!(flags & 1)) + continue; + if (!first) + seq_putc(m, '|'); + seq_puts(m, j < count ? flagname[j] : "UNKNOWN"); + first = false; } - if (j == count) - seq_printf(m, "%s\n", "UNKNOWN"); + seq_putc(m, '\n'); } else { seq_printf(m, "%s\n", "NONE"); } |