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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 17:51:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 17:51:54 -0700
commit20b4fb485227404329e41ad15588afad3df23050 (patch)
treef3e099f0ab3da8a93b447203e294d2bb22f6dc05 /mm
parentb9394d8a657cd3c064fa432aa0905c1b58b38fe9 (diff)
parentac3e3c5b1164397656df81b9e9ab4991184d3236 (diff)
downloadvexpress-lsk-20b4fb485227404329e41ad15588afad3df23050.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS updates from Al Viro, Misc cleanups all over the place, mainly wrt /proc interfaces (switch create_proc_entry to proc_create(), get rid of the deprecated create_proc_read_entry() in favor of using proc_create_data() and seq_file etc). 7kloc removed. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits) don't bother with deferred freeing of fdtables proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h proc: Make the PROC_I() and PDE() macros internal to procfs proc: Supply a function to remove a proc entry by PDE take cgroup_open() and cpuset_open() to fs/proc/base.c ppc: Clean up scanlog ppc: Clean up rtas_flash driver somewhat hostap: proc: Use remove_proc_subtree() drm: proc: Use remove_proc_subtree() drm: proc: Use minor->index to label things, not PDE->name drm: Constify drm_proc_list[] zoran: Don't print proc_dir_entry data in debug reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show() proc: Supply an accessor for getting the data from a PDE's parent airo: Use remove_proc_subtree() rtl8192u: Don't need to save device proc dir PDE rtl8187se: Use a dir under /proc/net/r8180/ proc: Add proc_mkdir_data() proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h} proc: Move PDE_NET() to fs/proc/proc_net.c ...
Diffstat (limited to 'mm')
-rw-r--r--mm/filemap.c2
-rw-r--r--mm/filemap_xip.c3
-rw-r--r--mm/vmalloc.c45
3 files changed, 40 insertions, 10 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index e989fb1eaa7..7905fe721aa 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2546,7 +2546,6 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
BUG_ON(iocb->ki_pos != pos);
- sb_start_write(inode->i_sb);
mutex_lock(&inode->i_mutex);
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
mutex_unlock(&inode->i_mutex);
@@ -2558,7 +2557,6 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (err < 0 && ret > 0)
ret = err;
}
- sb_end_write(inode->i_sb);
return ret;
}
EXPORT_SYMBOL(generic_file_aio_write);
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index a912da6ddfd..28fe26b64f8 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -404,8 +404,6 @@ xip_file_write(struct file *filp, const char __user *buf, size_t len,
loff_t pos;
ssize_t ret;
- sb_start_write(inode->i_sb);
-
mutex_lock(&inode->i_mutex);
if (!access_ok(VERIFY_READ, buf, len)) {
@@ -439,7 +437,6 @@ xip_file_write(struct file *filp, const char __user *buf, size_t len,
current->backing_dev_info = NULL;
out_up:
mutex_unlock(&inode->i_mutex);
- sb_end_write(inode->i_sb);
return ret;
}
EXPORT_SYMBOL_GPL(xip_file_write);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 72043d6c88c..b12fd861260 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -27,10 +27,30 @@
#include <linux/pfn.h>
#include <linux/kmemleak.h>
#include <linux/atomic.h>
+#include <linux/llist.h>
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
#include <asm/shmparam.h>
+struct vfree_deferred {
+ struct llist_head list;
+ struct work_struct wq;
+};
+static DEFINE_PER_CPU(struct vfree_deferred, vfree_deferred);
+
+static void __vunmap(const void *, int);
+
+static void free_work(struct work_struct *w)
+{
+ struct vfree_deferred *p = container_of(w, struct vfree_deferred, wq);
+ struct llist_node *llnode = llist_del_all(&p->list);
+ while (llnode) {
+ void *p = llnode;
+ llnode = llist_next(llnode);
+ __vunmap(p, 1);
+ }
+}
+
/*** Page table manipulation functions ***/
static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end)
@@ -1175,10 +1195,14 @@ void __init vmalloc_init(void)
for_each_possible_cpu(i) {
struct vmap_block_queue *vbq;
+ struct vfree_deferred *p;
vbq = &per_cpu(vmap_block_queue, i);
spin_lock_init(&vbq->lock);
INIT_LIST_HEAD(&vbq->free);
+ p = &per_cpu(vfree_deferred, i);
+ init_llist_head(&p->list);
+ INIT_WORK(&p->wq, free_work);
}
/* Import existing vmlist entries. */
@@ -1486,7 +1510,7 @@ static void __vunmap(const void *addr, int deallocate_pages)
kfree(area);
return;
}
-
+
/**
* vfree - release memory allocated by vmalloc()
* @addr: memory base address
@@ -1495,15 +1519,25 @@ static void __vunmap(const void *addr, int deallocate_pages)
* obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is
* NULL, no operation is performed.
*
- * Must not be called in interrupt context.
+ * Must not be called in NMI context (strictly speaking, only if we don't
+ * have CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG, but making the calling
+ * conventions for vfree() arch-depenedent would be a really bad idea)
+ *
*/
void vfree(const void *addr)
{
- BUG_ON(in_interrupt());
+ BUG_ON(in_nmi());
kmemleak_free(addr);
- __vunmap(addr, 1);
+ if (!addr)
+ return;
+ if (unlikely(in_interrupt())) {
+ struct vfree_deferred *p = &__get_cpu_var(vfree_deferred);
+ llist_add((struct llist_node *)addr, &p->list);
+ schedule_work(&p->wq);
+ } else
+ __vunmap(addr, 1);
}
EXPORT_SYMBOL(vfree);
@@ -1520,7 +1554,8 @@ void vunmap(const void *addr)
{
BUG_ON(in_interrupt());
might_sleep();
- __vunmap(addr, 0);
+ if (addr)
+ __vunmap(addr, 0);
}
EXPORT_SYMBOL(vunmap);