mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 15:39:42 -04:00
Code Issues Packages Projects Releases Wiki Activity

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Browse Source 
Minor line offset auto-merges.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-11-17 22:00:43 -05:00
parent c53aa5058a f4a75d2eb7
commit 67f4efdce7
384 changed files with 4492 additions and 2372 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
kernel/futex.c
View File

@@ -716,7 +716,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
struct futex_pi_state **ps,
struct task_struct *task, int set_waiters)
{
int lock_taken, ret, ownerdied = 0;
int lock_taken, ret, force_take = 0;
u32 uval, newval, curval, vpid = task_pid_vnr(task);
retry:
@@ -755,17 +755,15 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
newval = curval | FUTEX_WAITERS;
/*
* There are two cases, where a futex might have no owner (the
* owner TID is 0): OWNER_DIED. We take over the futex in this
* case. We also do an unconditional take over, when the owner
* of the futex died.
*
* This is safe as we are protected by the hash bucket lock !
* Should we force take the futex? See below.
*/
if (unlikely(ownerdied || !(curval & FUTEX_TID_MASK))) {
/* Keep the OWNER_DIED bit */
if (unlikely(force_take)) {
/*
* Keep the OWNER_DIED and the WAITERS bit and set the
* new TID value.
*/
newval = (curval & ~FUTEX_TID_MASK) | vpid;
ownerdied = 0;
force_take = 0;
lock_taken = 1;
}
@@ -775,7 +773,7 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
goto retry;
/*
* We took the lock due to owner died take over.
* We took the lock due to forced take over.
*/
if (unlikely(lock_taken))
return 1;
@@ -790,20 +788,25 @@ static int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
switch (ret) {
case -ESRCH:
/*
* No owner found for this futex. Check if the
* OWNER_DIED bit is set to figure out whether
* this is a robust futex or not.
* We failed to find an owner for this
* futex. So we have no pi_state to block
* on. This can happen in two cases:
*
* 1) The owner died
* 2) A stale FUTEX_WAITERS bit
*
* Re-read the futex value.
*/
if (get_futex_value_locked(&curval, uaddr))
return -EFAULT;
/*
* We simply start over in case of a robust
* futex. The code above will take the futex
* and return happy.
* If the owner died or we have a stale
* WAITERS bit the owner TID in the user space
* futex is 0.
*/
if (curval & FUTEX_OWNER_DIED) {
ownerdied = 1;
if (!(curval & FUTEX_TID_MASK)) {
force_take = 1;
goto retry;
}
default:

27
kernel/module.c
View File

@@ -2293,12 +2293,17 @@ static void layout_symtab(struct module *mod, struct load_info *info)
src = (void *)info->hdr + symsect->sh_offset;
nsrc = symsect->sh_size / sizeof(*src);
/* strtab always starts with a nul, so offset 0 is the empty string. */
strtab_size = 1;
/* Compute total space required for the core symbols' strtab. */
for (ndst = i = strtab_size = 1; i < nsrc; ++i, ++src)
if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) {
strtab_size += strlen(&info->strtab[src->st_name]) + 1;
for (ndst = i = 0; i < nsrc; i++) {
if (i == 0 ||
is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) {
strtab_size += strlen(&info->strtab[src[i].st_name])+1;
ndst++;
}
}
/* Append room for core symbols at end of core part. */
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1);
@@ -2332,15 +2337,15 @@ static void add_kallsyms(struct module *mod, const struct load_info *info)
mod->core_symtab = dst = mod->module_core + info->symoffs;
mod->core_strtab = s = mod->module_core + info->stroffs;
src = mod->symtab;
*dst = *src;
*s++ = 0;
for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) {
if (!is_core_symbol(src, info->sechdrs, info->hdr->e_shnum))
continue;
dst[ndst] = *src;
dst[ndst++].st_name = s - mod->core_strtab;
s += strlcpy(s, &mod->strtab[src->st_name], KSYM_NAME_LEN) + 1;
for (ndst = i = 0; i < mod->num_symtab; i++) {
if (i == 0 ||
is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) {
dst[ndst] = src[i];
dst[ndst++].st_name = s - mod->core_strtab;
s += strlcpy(s, &mod->strtab[src[i].st_name],
KSYM_NAME_LEN) + 1;
}
}
mod->core_num_syms = ndst;
}