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author | Ingo Molnar <mingo@elte.hu> | 2009-02-13 09:44:22 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-13 09:44:22 +0100 |
commit | f8a6b2b9cee298a9663cbe38ce1eb5240987cb62 (patch) | |
tree | b356490269c9e77d164dcc1477792b882fbb8bdb /fs/seq_file.c | |
parent | ba1511bf7fbda452138e4096bf10d5a382710f4f (diff) | |
parent | 071a0bc2ceace31266836801510879407a3701fa (diff) | |
download | op-kernel-dev-f8a6b2b9cee298a9663cbe38ce1eb5240987cb62.zip op-kernel-dev-f8a6b2b9cee298a9663cbe38ce1eb5240987cb62.tar.gz |
Merge branch 'linus' into x86/apic
Conflicts:
arch/x86/kernel/acpi/boot.c
arch/x86/mm/fault.c
Diffstat (limited to 'fs/seq_file.c')
-rw-r--r-- | fs/seq_file.c | 115 |
1 files changed, 58 insertions, 57 deletions
diff --git a/fs/seq_file.c b/fs/seq_file.c index b569ff1..5267098 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -54,6 +54,64 @@ int seq_open(struct file *file, const struct seq_operations *op) } EXPORT_SYMBOL(seq_open); +static int traverse(struct seq_file *m, loff_t offset) +{ + loff_t pos = 0, index; + int error = 0; + void *p; + + m->version = 0; + index = 0; + m->count = m->from = 0; + if (!offset) { + m->index = index; + return 0; + } + if (!m->buf) { + m->buf = kmalloc(m->size = PAGE_SIZE, GFP_KERNEL); + if (!m->buf) + return -ENOMEM; + } + p = m->op->start(m, &index); + while (p) { + error = PTR_ERR(p); + if (IS_ERR(p)) + break; + error = m->op->show(m, p); + if (error < 0) + break; + if (unlikely(error)) { + error = 0; + m->count = 0; + } + if (m->count == m->size) + goto Eoverflow; + if (pos + m->count > offset) { + m->from = offset - pos; + m->count -= m->from; + m->index = index; + break; + } + pos += m->count; + m->count = 0; + if (pos == offset) { + index++; + m->index = index; + break; + } + p = m->op->next(m, p, &index); + } + m->op->stop(m, p); + m->index = index; + return error; + +Eoverflow: + m->op->stop(m, p); + kfree(m->buf); + m->buf = kmalloc(m->size <<= 1, GFP_KERNEL); + return !m->buf ? -ENOMEM : -EAGAIN; +} + /** * seq_read - ->read() method for sequential files. * @file: the file to read from @@ -186,63 +244,6 @@ Efault: } EXPORT_SYMBOL(seq_read); -static int traverse(struct seq_file *m, loff_t offset) -{ - loff_t pos = 0, index; - int error = 0; - void *p; - - m->version = 0; - index = 0; - m->count = m->from = 0; - if (!offset) { - m->index = index; - return 0; - } - if (!m->buf) { - m->buf = kmalloc(m->size = PAGE_SIZE, GFP_KERNEL); - if (!m->buf) - return -ENOMEM; - } - p = m->op->start(m, &index); - while (p) { - error = PTR_ERR(p); - if (IS_ERR(p)) - break; - error = m->op->show(m, p); - if (error < 0) - break; - if (unlikely(error)) { - error = 0; - m->count = 0; - } - if (m->count == m->size) - goto Eoverflow; - if (pos + m->count > offset) { - m->from = offset - pos; - m->count -= m->from; - m->index = index; - break; - } - pos += m->count; - m->count = 0; - if (pos == offset) { - index++; - m->index = index; - break; - } - p = m->op->next(m, p, &index); - } - m->op->stop(m, p); - return error; - -Eoverflow: - m->op->stop(m, p); - kfree(m->buf); - m->buf = kmalloc(m->size <<= 1, GFP_KERNEL); - return !m->buf ? -ENOMEM : -EAGAIN; -} - /** * seq_lseek - ->llseek() method for sequential files. * @file: the file in question |