diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2015-01-12 10:51:13 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-01-12 10:51:13 +0100 |
| commit | 2f5eaf66e580f64032b365a00157b6b58c266b37 (patch) | |
| tree | 7852017c864f0eb3833782e2a017952bd8531458 /mm/filemap_xip.c | |
| parent | c291ee622165cb2c8d4e7af63fffd499354a23be (diff) | |
| parent | 91d1179212161f220938198b742c328ad38fd0a3 (diff) | |
Merge tag 'irqchip-urgent-3.19' of git://git.infradead.org/users/jcooper/linux into irq/urgent
irqchip urgent fixes for v3.19 from Jason Cooper
- mtk-sysirq: Fix error handling
- hip04: Fix cpu map for 16bit value
- gic-v3-its: Clear a warning regarding decimal constants
- omap-intc: Fix legacy DMA regression
- atmel-aic-common: Retain priority when changing type
Diffstat (limited to 'mm/filemap_xip.c')
| -rw-r--r-- | mm/filemap_xip.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c index d8d9fe3f685..0d105aeff82 100644 --- a/mm/filemap_xip.c +++ b/mm/filemap_xip.c @@ -155,22 +155,14 @@ xip_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) EXPORT_SYMBOL_GPL(xip_file_read); /* - * __xip_unmap is invoked from xip_unmap and - * xip_write + * __xip_unmap is invoked from xip_unmap and xip_write * * This function walks all vmas of the address_space and unmaps the * __xip_sparse_page when found at pgoff. */ -static void -__xip_unmap (struct address_space * mapping, - unsigned long pgoff) +static void __xip_unmap(struct address_space * mapping, unsigned long pgoff) { struct vm_area_struct *vma; - struct mm_struct *mm; - unsigned long address; - pte_t *pte; - pte_t pteval; - spinlock_t *ptl; struct page *page; unsigned count; int locked = 0; @@ -182,11 +174,14 @@ __xip_unmap (struct address_space * mapping, return; retry: - mutex_lock(&mapping->i_mmap_mutex); + i_mmap_lock_read(mapping); vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { - mm = vma->vm_mm; - address = vma->vm_start + + pte_t *pte, pteval; + spinlock_t *ptl; + struct mm_struct *mm = vma->vm_mm; + unsigned long address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); + BUG_ON(address < vma->vm_start || address >= vma->vm_end); pte = page_check_address(page, mm, address, &ptl, 1); if (pte) { @@ -202,7 +197,7 @@ retry: page_cache_release(page); } } - mutex_unlock(&mapping->i_mmap_mutex); + i_mmap_unlock_read(mapping); if (locked) { mutex_unlock(&xip_sparse_mutex); |