The patch titled
proc: remove trailing blank entry from pid_entry arrays
has been removed from the -mm tree. Its filename is
proc-remove-trailing-blank-entry-from-pid_entry-arrays.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: proc: remove trailing blank entry from pid_entry arrays
From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
It was pointed out that since I am taking ARRAY_SIZE anyway the trailing empty
entry is silly and just wastes space.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/proc/base.c | 39 +++++++++++++++++++++------------------
1 file changed, 21 insertions(+), 18 deletions(-)
diff -puN fs/proc/base.c~proc-remove-trailing-blank-entry-from-pid_entry-arrays fs/proc/base.c
--- a/fs/proc/base.c~proc-remove-trailing-blank-entry-from-pid_entry-arrays
+++ a/fs/proc/base.c
@@ -1377,12 +1377,13 @@ out:
/* SMP-safe */
static struct dentry *proc_pident_lookup(struct inode *dir,
struct dentry *dentry,
- struct pid_entry *ents)
+ struct pid_entry *ents,
+ unsigned int nents)
{
struct inode *inode;
struct dentry *error;
struct task_struct *task = get_proc_task(dir);
- struct pid_entry *p;
+ struct pid_entry *p, *last;
error = ERR_PTR(-ENOENT);
inode = NULL;
@@ -1394,13 +1395,14 @@ static struct dentry *proc_pident_lookup
* Yes, it does not scale. And it should not. Don't add
* new entries into /proc/<tgid>/ without very good reasons.
*/
- for (p = ents; p->name; p++) {
+ last = &ents[nents - 1];
+ for (p = ents; p <= last; p++) {
if (p->len != dentry->d_name.len)
continue;
if (!memcmp(dentry->d_name.name, p->name, p->len))
break;
}
- if (!p->name)
+ if (p > last)
goto out;
error = proc_pident_instantiate(dir, dentry, task, p);
@@ -1426,7 +1428,7 @@ static int proc_pident_readdir(struct fi
struct dentry *dentry = filp->f_dentry;
struct inode *inode = dentry->d_inode;
struct task_struct *task = get_proc_task(inode);
- struct pid_entry *p;
+ struct pid_entry *p, *last;
ino_t ino;
int ret;
@@ -1459,7 +1461,8 @@ static int proc_pident_readdir(struct fi
goto out;
}
p = ents + i;
- while (p->name) {
+ last = &ents[nents - 1];
+ while (p <= last) {
if (proc_pident_fill_cache(filp, dirent, filldir, task, p) < 0)
goto out;
filp->f_pos++;
@@ -1556,7 +1559,6 @@ static struct pid_entry attr_dir_stuff[]
REG("fscreate", S_IRUGO|S_IWUGO, pid_attr),
REG("keycreate", S_IRUGO|S_IWUGO, pid_attr),
REG("sockcreate", S_IRUGO|S_IWUGO, pid_attr),
- {}
};
static int proc_attr_dir_readdir(struct file * filp,
@@ -1574,7 +1576,8 @@ static struct file_operations proc_attr_
static struct dentry *proc_attr_dir_lookup(struct inode *dir,
struct dentry *dentry, struct nameidata *nd)
{
- return proc_pident_lookup(dir, dentry, attr_dir_stuff);
+ return proc_pident_lookup(dir, dentry,
+ attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
}
static struct inode_operations proc_attr_dir_inode_operations = {
@@ -1618,7 +1621,6 @@ static struct inode_operations proc_self
static struct pid_entry proc_base_stuff[] = {
NOD("self", S_IFLNK|S_IRWXUGO,
&proc_self_inode_operations, NULL, {}),
- {}
};
/*
@@ -1695,7 +1697,7 @@ static struct dentry *proc_base_lookup(s
{
struct dentry *error;
struct task_struct *task = get_proc_task(dir);
- struct pid_entry *p;
+ struct pid_entry *p, *last;
error = ERR_PTR(-ENOENT);
@@ -1703,13 +1705,14 @@ static struct dentry *proc_base_lookup(s
goto out_no_task;
/* Lookup the directory entry */
- for (p = proc_base_stuff; p->name; p++) {
+ last = &proc_base_stuff[ARRAY_SIZE(proc_base_stuff) - 1];
+ for (p = proc_base_stuff; p <= last; p++) {
if (p->len != dentry->d_name.len)
continue;
if (!memcmp(dentry->d_name.name, p->name, p->len))
break;
}
- if (!p->name)
+ if (p > last)
goto out;
error = proc_base_instantiate(dir, dentry, task, p);
@@ -1775,7 +1778,6 @@ static struct pid_entry tgid_base_stuff[
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
#endif
- {}
};
static int proc_tgid_base_readdir(struct file * filp,
@@ -1791,7 +1793,8 @@ static struct file_operations proc_tgid_
};
static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
- return proc_pident_lookup(dir, dentry, tgid_base_stuff);
+ return proc_pident_lookup(dir, dentry,
+ tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
}
static struct inode_operations proc_tgid_base_inode_operations = {
@@ -1961,7 +1964,7 @@ retry:
return task;
}
-#define TGID_OFFSET (FIRST_PROCESS_ENTRY + (ARRAY_SIZE(proc_base_stuff) - 1))
+#define TGID_OFFSET (FIRST_PROCESS_ENTRY + ARRAY_SIZE(proc_base_stuff))
static int proc_pid_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
struct task_struct *task, int tgid)
@@ -1983,7 +1986,7 @@ int proc_pid_readdir(struct file * filp,
if (!reaper)
goto out_no_task;
- for (; nr < (ARRAY_SIZE(proc_base_stuff) - 1); filp->f_pos++, nr++) {
+ for (; nr < ARRAY_SIZE(proc_base_stuff); filp->f_pos++, nr++) {
struct pid_entry *p = &proc_base_stuff[nr];
if (proc_base_fill_cache(filp, dirent, filldir, reaper, p) < 0)
goto out;
@@ -2050,7 +2053,6 @@ static struct pid_entry tid_base_stuff[]
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
#endif
- {}
};
static int proc_tid_base_readdir(struct file * filp,
@@ -2061,7 +2063,8 @@ static int proc_tid_base_readdir(struct
}
static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
- return proc_pident_lookup(dir, dentry, tid_base_stuff);
+ return proc_pident_lookup(dir, dentry,
+ tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
}
static struct file_operations proc_tid_base_operations = {
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
origin.patch
namespaces-utsname-introduce-temporary-helpers.patch
git-scsi-misc.patch
revert-insert-ioapics-and-local-apic-into-resource-map.patch
insert-local-and-io-apics-into-resource-map.patch
genirq-irq-convert-the-move_irq-flag-from-a-32bit-word-to-a-single-bit.patch
genirq-irq-add-moved_masked_irq.patch
genirq-x86_64-irq-reenable-migrating-irqs-to-other-cpus.patch
genirq-msi-simplify-msi-enable-and-disable.patch
genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1.patch
genirq-msi-implement-helper-functions-read_msi_msg-and-write_msi_msg.patch
genirq-msi-refactor-the-msi_ops.patch
genirq-msi-simplify-the-msi-irq-limit-policy.patch
genirq-irq-add-a-dynamic-irq-creation-api.patch
genirq-ia64-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support.patch
genirq-x86_64-irq-dynamic-irq-support.patch
genirq-msi-make-the-msi-code-irq-based-and-not-vector-based.patch
genirq-x86_64-irq-move-msi-message-composition-into-io_apicc.patch
genirq-i386-irq-move-msi-message-composition-into-io_apicc.patch
genirq-msi-only-build-msi-apicc-on-ia64.patch
genirq-msi-only-build-msi-apicc-on-ia64-fix.patch
genirq-x86_64-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-irq-remove-msi-hacks.patch
genirq-irq-generalize-the-check-for-hardirq_bits.patch
genirq-x86_64-irq-make-the-external-irq-handlers-report-their-vector-not-the-irq-number.patch
genirq-x86_64-irq-make-vector_irq-per-cpu.patch
genirq-x86_64-irq-make-vector_irq-per-cpu-fix.patch
genirq-x86_64-irq-make-vector_irq-per-cpu-warning-fix.patch
genirq-x86_64-irq-kill-gsi_irq_sharing.patch
genirq-x86_64-irq-kill-irq-compression.patch
add-hypertransport-capability-defines.patch
add-hypertransport-capability-defines-fix.patch
initial-generic-hypertransport-interrupt-support.patch
initial-generic-hypertransport-interrupt-support-Kconfig-fix.patch
msi-simplify-msi-sanity-checks-by-adding-with-generic-irq-code.patch
msi-only-use-a-single-irq_chip-for-msi-interrupts.patch
msi-refactor-and-move-the-msi-irq_chip-into-the-arch-code.patch
msi-move-the-ia64-code-into-arch-ia64.patch
htirq-tidy-up-the-htirq-code.patch
genirq-clean-up-irq-flow-type-naming.patch
pidhash-temporary-debug-checks.patch
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