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perf header: Revamp do_write()
Now that writen takes a const buffer, use it in do_write instead of duplicating its functionality. Export do_write to use it consistently in header.c and build_id.c . Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> Acked-by: David Ahern <dsahern@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Turner <pjt@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Que <sque@chromium.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20170718042549.145161-6-davidcc@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -304,7 +304,7 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id,
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b.header.misc = misc;
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b.header.size = sizeof(b) + len;
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err = writen(fd, &b, sizeof(b));
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err = do_write(fd, &b, sizeof(b));
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if (err < 0)
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return err;
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@ -75,17 +75,13 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
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}
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/* Return: 0 if succeded, -ERR if failed. */
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static int do_write(int fd, const void *buf, size_t size)
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int do_write(int fd, const void *buf, size_t size)
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{
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while (size) {
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int ret = write(fd, buf, size);
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ssize_t ret;
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if (ret < 0)
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return -errno;
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size -= ret;
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buf += ret;
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}
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ret = writen(fd, buf, size);
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if (ret != (ssize_t)size)
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return ret < 0 ? (int)ret : -1;
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return 0;
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}
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@ -144,6 +144,8 @@ bool is_perf_magic(u64 magic);
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#define NAME_ALIGN 64
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int do_write(int fd, const void *buf, size_t size);
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int write_padded(int fd, const void *bf, size_t count, size_t count_aligned);
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/*
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