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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2017-01-09 15:49:28 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-01-09 10:22:21 -0500 |
| commit | fb1b8b117531f217e7d332bdc5cbdf8ebb077ea5 (patch) | |
| tree | 71b91db01fb9ced140ba02de61ed3f0a7ec28038 /drivers/ata | |
| parent | 368e5fbdfc60732643f34f538823ed4bc8829827 (diff) | |
| download | linux-stable-fb1b8b117531f217e7d332bdc5cbdf8ebb077ea5.tar.gz linux-stable-fb1b8b117531f217e7d332bdc5cbdf8ebb077ea5.tar.bz2 linux-stable-fb1b8b117531f217e7d332bdc5cbdf8ebb077ea5.zip | |
libata-eh: Use switch() instead of sparse array for protocol strings
Replace the sparse 256-pointer array for looking up protocol strings by
a switch() statement to reduce kernel size.
According to bloat-o-meter, this saves 910 bytes on m68k (32-bit), and
1892 bytes on arm64 (64-bit).
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-eh.c | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 0e1ec37070d1..e7196fc29ff0 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2606,21 +2606,39 @@ static void ata_eh_link_report(struct ata_link *link) [DMA_TO_DEVICE] = "out", [DMA_FROM_DEVICE] = "in", }; - static const char *prot_str[] = { - [ATA_PROT_UNKNOWN] = "unknown", - [ATA_PROT_NODATA] = "nodata", - [ATA_PROT_PIO] = "pio", - [ATA_PROT_DMA] = "dma", - [ATA_PROT_NCQ] = "ncq dma", - [ATA_PROT_NCQ_NODATA] = "ncq nodata", - [ATAPI_PROT_NODATA] = "nodata", - [ATAPI_PROT_PIO] = "pio", - [ATAPI_PROT_DMA] = "dma", - }; + const char *prot_str = NULL; + switch (qc->tf.protocol) { + case ATA_PROT_UNKNOWN: + prot_str = "unknown"; + break; + case ATA_PROT_NODATA: + prot_str = "nodata"; + break; + case ATA_PROT_PIO: + prot_str = "pio"; + break; + case ATA_PROT_DMA: + prot_str = "dma"; + break; + case ATA_PROT_NCQ: + prot_str = "ncq dma"; + break; + case ATA_PROT_NCQ_NODATA: + prot_str = "ncq nodata"; + break; + case ATAPI_PROT_NODATA: + prot_str = "nodata"; + break; + case ATAPI_PROT_PIO: + prot_str = "pio"; + break; + case ATAPI_PROT_DMA: + prot_str = "dma"; + break; + } snprintf(data_buf, sizeof(data_buf), " %s %u %s", - prot_str[qc->tf.protocol], qc->nbytes, - dma_str[qc->dma_dir]); + prot_str, qc->nbytes, dma_str[qc->dma_dir]); } if (ata_is_atapi(qc->tf.protocol)) { |