diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2023-02-28 17:43:08 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-03-06 02:41:25 +0300 |
| commit | fc12d4bb3227f21e1e7d6d78231074ca542c060d (patch) | |
| tree | 9d9837893a359ec9ccaab9107533f574fc99445b /drivers/spi/spi.c | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
| download | linux-fc12d4bb3227f21e1e7d6d78231074ca542c060d.tar.xz | |
spi: Replace spi_pcpu_stats_totalize() macro by a C function
spi_pcpu_stats_totalize() is a rather large macro, and is instantiated
28 times, causing a large amount of duplication in the amount of
generated code.
Reduce the duplication by replacing spi_pcpu_stats_totalize() by a real
C function, and absorb all other common code from
spi_statistics_##name##_show(). As (a) the old "field" parameter was
the name of a structure member, which cannot be passed to a function,
and (b) passing a pointer to the member is also not an option, due to
the loop over all possible CPUs, the "field" parameter is replaced by an
"offset" parameter, pointing to a location within the structure.
This reduces kernel size by ca. 4 KiB (on arm32 and arm64).
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/cb7690d9d04c06eec23dbb98fbb5444082125cff.1677594432.git.geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 44b85a8d47f1..798030c0c5ce 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -117,24 +117,28 @@ static struct spi_statistics __percpu *spi_alloc_pcpu_stats(struct device *dev) return pcpu_stats; } -#define spi_pcpu_stats_totalize(ret, in, field) \ -do { \ - int i; \ - ret = 0; \ - for_each_possible_cpu(i) { \ - const struct spi_statistics *pcpu_stats; \ - u64 inc; \ - unsigned int start; \ - pcpu_stats = per_cpu_ptr(in, i); \ - do { \ - start = u64_stats_fetch_begin( \ - &pcpu_stats->syncp); \ - inc = u64_stats_read(&pcpu_stats->field); \ - } while (u64_stats_fetch_retry( \ - &pcpu_stats->syncp, start)); \ - ret += inc; \ - } \ -} while (0) +static ssize_t spi_emit_pcpu_stats(struct spi_statistics __percpu *stat, + char *buf, size_t offset) +{ + u64 val = 0; + int i; + + for_each_possible_cpu(i) { + const struct spi_statistics *pcpu_stats; + u64_stats_t *field; + unsigned int start; + u64 inc; + + pcpu_stats = per_cpu_ptr(stat, i); + field = (void *)pcpu_stats + offset; + do { + start = u64_stats_fetch_begin(&pcpu_stats->syncp); + inc = u64_stats_read(field); + } while (u64_stats_fetch_retry(&pcpu_stats->syncp, start)); + val += inc; + } + return sysfs_emit(buf, "%llu\n", val); +} #define SPI_STATISTICS_ATTRS(field, file) \ static ssize_t spi_controller_##field##_show(struct device *dev, \ @@ -165,11 +169,8 @@ static struct device_attribute dev_attr_spi_device_##field = { \ static ssize_t spi_statistics_##name##_show(struct spi_statistics __percpu *stat, \ char *buf) \ { \ - ssize_t len; \ - u64 val; \ - spi_pcpu_stats_totalize(val, stat, field); \ - len = sysfs_emit(buf, "%llu\n", val); \ - return len; \ + return spi_emit_pcpu_stats(stat, buf, \ + offsetof(struct spi_statistics, field)); \ } \ SPI_STATISTICS_ATTRS(name, file) |