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authorArnd Bergmann <arnd@arndb.de>2012-05-02 17:07:03 +0200
committerArnd Bergmann <arnd@arndb.de>2012-05-02 17:07:03 +0200
commitced62c33fc434b9d44118c9f35803af8088cc3fe (patch)
tree34d1145899e0e5853c4d5b45162f86bbe46941ea /mm/nommu.c
parent3ff80abce7d0d3c1eacda53e73c94a57ade2e0a5 (diff)
parent6838e601e6dc63440fd4315c1c2f3a2ef4ccdd6e (diff)
Merge tag 'imx-cleanup' of git://git.pengutronix.de/git/imx/linux-2.6 into next/cleanup
From: Sascha Hauer <s.hauer@pengutronix.de> ARM: i.MX cleanups for 3.5 * tag 'imx-cleanup' of git://git.pengutronix.de/git/imx/linux-2.6: (5 commits) ARM: mx53: fix pad definitions for MX53_PAD_EIM_D28__I2C1_SDA and MX53_PAD_GPIO_8__CAN1_RXCAN ARM: imx/eukrea_mbimx27-baseboard: fix typo in error message ARM: i.MX51 iomux: add missed definitions for SION-bit and mode for some pads arm: imx: add missing select IMX_HAVE_PLATFORM for MACH_MX35_3DS in Kconfig arm: imx: make various struct sys_timer static Includes an update to 3.4-rc4 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c41
1 files changed, 36 insertions, 5 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index f59e170fceb..bb8f4f004a8 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1233,7 +1233,7 @@ enomem:
/*
* handle mapping creation for uClinux
*/
-unsigned long do_mmap_pgoff(struct file *file,
+static unsigned long do_mmap_pgoff(struct file *file,
unsigned long addr,
unsigned long len,
unsigned long prot,
@@ -1470,7 +1470,32 @@ error_getting_region:
show_free_areas(0);
return -ENOMEM;
}
-EXPORT_SYMBOL(do_mmap_pgoff);
+
+unsigned long do_mmap(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long prot,
+ unsigned long flag, unsigned long offset)
+{
+ if (unlikely(offset + PAGE_ALIGN(len) < offset))
+ return -EINVAL;
+ if (unlikely(offset & ~PAGE_MASK))
+ return -EINVAL;
+ return do_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(do_mmap);
+
+unsigned long vm_mmap(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long prot,
+ unsigned long flag, unsigned long offset)
+{
+ unsigned long ret;
+ struct mm_struct *mm = current->mm;
+
+ down_write(&mm->mmap_sem);
+ ret = do_mmap(file, addr, len, prot, flag, offset);
+ up_write(&mm->mmap_sem);
+ return ret;
+}
+EXPORT_SYMBOL(vm_mmap);
SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
@@ -1709,16 +1734,22 @@ erase_whole_vma:
}
EXPORT_SYMBOL(do_munmap);
-SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
+int vm_munmap(unsigned long addr, size_t len)
{
- int ret;
struct mm_struct *mm = current->mm;
+ int ret;
down_write(&mm->mmap_sem);
ret = do_munmap(mm, addr, len);
up_write(&mm->mmap_sem);
return ret;
}
+EXPORT_SYMBOL(vm_munmap);
+
+SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
+{
+ return vm_munmap(addr, len);
+}
/*
* release all the mappings made in a process's VM space
@@ -1744,7 +1775,7 @@ void exit_mmap(struct mm_struct *mm)
kleave("");
}
-unsigned long do_brk(unsigned long addr, unsigned long len)
+unsigned long vm_brk(unsigned long addr, unsigned long len)
{
return -ENOMEM;
}