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| author | Suleiman Souhlal <ssouhlal@FreeBSD.org> | 2006-12-06 20:32:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:22 -0800 |
| commit | 881e4aabe4c6b3fce93674b67c6adc646fe2683b (patch) | |
| tree | f5e429c01ca20c8bb8bd300e33013f056516b131 /mm/swapfile.c | |
| parent | b43a57bb4dae72e8f7232e7c821a8799eda30022 (diff) | |
| download | lwn-881e4aabe4c6b3fce93674b67c6adc646fe2683b.tar.gz lwn-881e4aabe4c6b3fce93674b67c6adc646fe2683b.zip | |
[PATCH] Always print out the header line in /proc/swaps
It would be possible for /proc/swaps to not always print out the header:
swapon /dev/hdc2
swapon /dev/hde2
swapoff /dev/hdc2
At this point /proc/swaps would not have a header.
Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index a15def63f28f..8e206cea0f5e 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1274,10 +1274,13 @@ static void *swap_start(struct seq_file *swap, loff_t *pos) mutex_lock(&swapon_mutex); + if (!l) + return SEQ_START_TOKEN; + for (i = 0; i < nr_swapfiles; i++, ptr++) { if (!(ptr->flags & SWP_USED) || !ptr->swap_map) continue; - if (!l--) + if (!--l) return ptr; } @@ -1286,10 +1289,17 @@ static void *swap_start(struct seq_file *swap, loff_t *pos) static void *swap_next(struct seq_file *swap, void *v, loff_t *pos) { - struct swap_info_struct *ptr = v; + struct swap_info_struct *ptr; struct swap_info_struct *endptr = swap_info + nr_swapfiles; - for (++ptr; ptr < endptr; ptr++) { + if (v == SEQ_START_TOKEN) + ptr = swap_info; + else { + ptr = v; + ptr++; + } + + for (; ptr < endptr; ptr++) { if (!(ptr->flags & SWP_USED) || !ptr->swap_map) continue; ++*pos; @@ -1310,8 +1320,10 @@ static int swap_show(struct seq_file *swap, void *v) struct file *file; int len; - if (v == swap_info) - seq_puts(swap, "Filename\t\t\t\tType\t\tSize\tUsed\tPriority\n"); + if (ptr == SEQ_START_TOKEN) { + seq_puts(swap,"Filename\t\t\t\tType\t\tSize\tUsed\tPriority\n"); + return 0; + } file = ptr->swap_file; len = seq_path(swap, file->f_vfsmnt, file->f_dentry, " \t\n\\"); |