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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2022-11-02 16:49:16 +0800 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2022-11-12 18:47:36 -0800 |
| commit | 19bd8981dc2ee35fdc81ab1b0104b607c917d470 (patch) | |
| tree | f6aa4bb086792556d242c82f7f6810296705d499 /scripts/kallsyms.c | |
| parent | 010a0aad39fccceba4a07d30d163158a39c704f3 (diff) | |
| download | lwn-19bd8981dc2ee35fdc81ab1b0104b607c917d470.tar.gz lwn-19bd8981dc2ee35fdc81ab1b0104b607c917d470.zip | |
kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[]
kallsyms_seqs_of_names[] records the symbol index sorted by address, the
maximum value in kallsyms_seqs_of_names[] is the number of symbols. And
2^24 = 16777216, which means that three bytes are enough to store the
index. This can help us save (1 * kallsyms_num_syms) bytes of memory.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'scripts/kallsyms.c')
| -rw-r--r-- | scripts/kallsyms.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index 07ecf7e5c49f..04e04fbd9625 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -600,7 +600,10 @@ static void write_src(void) sort_symbols_by_name(); output_label("kallsyms_seqs_of_names"); for (i = 0; i < table_cnt; i++) - printf("\t.long\t%u\n", table[i]->seq); + printf("\t.byte 0x%02x, 0x%02x, 0x%02x\n", + (unsigned char)(table[i]->seq >> 16), + (unsigned char)(table[i]->seq >> 8), + (unsigned char)(table[i]->seq >> 0)); printf("\n"); output_label("kallsyms_token_table"); |