The patch titled nommu: add new vmalloc_user() and remap_vmalloc_range() interfaces. has been removed from the -mm tree. Its filename was nommu-add-new-vmalloc_user-and-remap_vmalloc_range-interfaces.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: nommu: add new vmalloc_user() and remap_vmalloc_range() interfaces. From: Paul Mundt <lethal@xxxxxxxxxxxx> This builds on top of the earlier vmalloc_32_user() work introduced by b50731732f926d6c49fd0724616a7344c31cd5cf, as we now have places in the nommu allmodconfig that hit up against these missing APIs. As vmalloc_32_user() is already implemented, this is moved over to vmalloc_user() and simply made a wrapper. As all current nommu platforms are 32-bit addressable, there's no special casing we have to do for ZONE_DMA and things of that nature as per GFP_VMALLOC32. remap_vmalloc_range() needs to check VM_USERMAP in order to figure out whether we permit the remap or not, which means that we also have to rework the vmalloc_user() code to grovel for the VMA and set the flag. Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx> Acked-by: David McCullough <david_mccullough@xxxxxxxxxxxxxxxxxxx> Acked-by: David Howells <dhowells@xxxxxxxxxx> Acked-by: Greg Ungerer <gerg@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/nommu.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff -puN mm/nommu.c~nommu-add-new-vmalloc_user-and-remap_vmalloc_range-interfaces mm/nommu.c --- a/mm/nommu.c~nommu-add-new-vmalloc_user-and-remap_vmalloc_range-interfaces +++ a/mm/nommu.c @@ -10,6 +10,7 @@ * Copyright (c) 2000-2003 David McCullough <davidm@xxxxxxxxxxxx> * Copyright (c) 2000-2001 D Jeff Dionne <jeff@xxxxxxxxxxx> * Copyright (c) 2002 Greg Ungerer <gerg@xxxxxxxxxxxx> + * Copyright (c) 2007 Paul Mundt <lethal@xxxxxxxxxxxx> */ #include <linux/module.h> @@ -183,6 +184,26 @@ void *__vmalloc(unsigned long size, gfp_ } EXPORT_SYMBOL(__vmalloc); +void *vmalloc_user(unsigned long size) +{ + void *ret; + + ret = __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, + PAGE_KERNEL); + if (ret) { + struct vm_area_struct *vma; + + down_write(¤t->mm->mmap_sem); + vma = find_vma(current->mm, (unsigned long)ret); + if (vma) + vma->vm_flags |= VM_USERMAP; + up_write(¤t->mm->mmap_sem); + } + + return ret; +} +EXPORT_SYMBOL(vmalloc_user); + struct page *vmalloc_to_page(const void *addr) { return virt_to_page(addr); @@ -253,10 +274,17 @@ EXPORT_SYMBOL(vmalloc_32); * * The resulting memory area is 32bit addressable and zeroed so it can be * mapped to userspace without leaking data. + * + * VM_USERMAP is set on the corresponding VMA so that subsequent calls to + * remap_vmalloc_range() are permissible. */ void *vmalloc_32_user(unsigned long size) { - return __vmalloc(size, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL); + /* + * We'll have to sort out the ZONE_DMA bits for 64-bit, + * but for now this can simply use vmalloc_user() directly. + */ + return vmalloc_user(size); } EXPORT_SYMBOL(vmalloc_32_user); @@ -1216,6 +1244,21 @@ int remap_pfn_range(struct vm_area_struc } EXPORT_SYMBOL(remap_pfn_range); +int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, + unsigned long pgoff) +{ + unsigned int size = vma->vm_end - vma->vm_start; + + if (!(vma->vm_flags & VM_USERMAP)) + return -EINVAL; + + vma->vm_start = (unsigned long)(addr + (pgoff << PAGE_SHIFT)); + vma->vm_end = vma->vm_start + size; + + return 0; +} +EXPORT_SYMBOL(remap_vmalloc_range); + void swap_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) { } _ Patches currently in -mm which might be from lethal@xxxxxxxxxxxx are origin.patch timerfd-fix-remaining-architectures.patch git-sh.patch kernel-printkc-concerns-about-the-console-handover.patch fix-__const_udelay-declaration-and-definition-mismatches.patch spi-superh-spi-using-sci.patch rtc-ds1302-rtc-support.patch rtc-ds1302-rtc-support-checkpatch-fixes.patch fb-defio-nopage.patch fb-nvidiafb-try-harder-at-initial-mode-setting.patch sm501fb-control-panel-pin-usage-with-platform-data-flags.patch sm501fb-clear-framebuffer-memory-and-palette.patch use-bootmem_exclusive-for-kdump.patch sanitize-the-type-of-struct-useru_ar0.patch avoid-overflows-in-kernel-timec.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html