The patch titled
Subject: maccess: move user access routines together
has been removed from the -mm tree. Its filename was
maccess-move-user-access-routines-together.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: maccess: move user access routines together
Move kernel access vs user access routines together to ease upcoming
ifdefs.
Link: http://lkml.kernel.org/r/20200521152301.2587579-18-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/maccess.c | 112 ++++++++++++++++++++++++-------------------------
1 file changed, 56 insertions(+), 56 deletions(-)
--- a/mm/maccess.c~maccess-move-user-access-routines-together
+++ a/mm/maccess.c
@@ -47,34 +47,6 @@ long probe_kernel_read(void *dst, const
EXPORT_SYMBOL_GPL(probe_kernel_read);
/**
- * probe_user_read(): safely attempt to read from a user-space location
- * @dst: pointer to the buffer that shall take the data
- * @src: address to read from. This must be a user address.
- * @size: size of the data chunk
- *
- * Safely read from user address @src to the buffer at @dst. If a kernel fault
- * happens, handle that and return -EFAULT.
- */
-long probe_user_read(void *dst, const void __user *src, size_t size)
-{
- long ret = -EFAULT;
- mm_segment_t old_fs = get_fs();
-
- set_fs(USER_DS);
- if (access_ok(src, size)) {
- pagefault_disable();
- ret = __copy_from_user_inatomic(dst, src, size);
- pagefault_enable();
- }
- set_fs(old_fs);
-
- if (ret)
- return -EFAULT;
- return 0;
-}
-EXPORT_SYMBOL_GPL(probe_user_read);
-
-/**
* probe_kernel_write(): safely attempt to write to a location
* @dst: address to write to
* @src: pointer to the data that shall be written
@@ -100,34 +72,6 @@ long probe_kernel_write(void *dst, const
}
/**
- * probe_user_write(): safely attempt to write to a user-space location
- * @dst: address to write to
- * @src: pointer to the data that shall be written
- * @size: size of the data chunk
- *
- * Safely write to address @dst from the buffer at @src. If a kernel fault
- * happens, handle that and return -EFAULT.
- */
-long probe_user_write(void __user *dst, const void *src, size_t size)
-{
- long ret = -EFAULT;
- mm_segment_t old_fs = get_fs();
-
- set_fs(USER_DS);
- if (access_ok(dst, size)) {
- pagefault_disable();
- ret = __copy_to_user_inatomic(dst, src, size);
- pagefault_enable();
- }
- set_fs(old_fs);
-
- if (ret)
- return -EFAULT;
- return 0;
-}
-EXPORT_SYMBOL_GPL(probe_user_write);
-
-/**
* strncpy_from_kernel_nofault: - Copy a NUL terminated string from unsafe
* address.
* @dst: Destination address, in kernel space. This buffer must be at
@@ -171,6 +115,62 @@ long strncpy_from_kernel_nofault(char *d
}
/**
+ * probe_user_read(): safely attempt to read from a user-space location
+ * @dst: pointer to the buffer that shall take the data
+ * @src: address to read from. This must be a user address.
+ * @size: size of the data chunk
+ *
+ * Safely read from user address @src to the buffer at @dst. If a kernel fault
+ * happens, handle that and return -EFAULT.
+ */
+long probe_user_read(void *dst, const void __user *src, size_t size)
+{
+ long ret = -EFAULT;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(USER_DS);
+ if (access_ok(src, size)) {
+ pagefault_disable();
+ ret = __copy_from_user_inatomic(dst, src, size);
+ pagefault_enable();
+ }
+ set_fs(old_fs);
+
+ if (ret)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(probe_user_read);
+
+/**
+ * probe_user_write(): safely attempt to write to a user-space location
+ * @dst: address to write to
+ * @src: pointer to the data that shall be written
+ * @size: size of the data chunk
+ *
+ * Safely write to address @dst from the buffer at @src. If a kernel fault
+ * happens, handle that and return -EFAULT.
+ */
+long probe_user_write(void __user *dst, const void *src, size_t size)
+{
+ long ret = -EFAULT;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(USER_DS);
+ if (access_ok(dst, size)) {
+ pagefault_disable();
+ ret = __copy_to_user_inatomic(dst, src, size);
+ pagefault_enable();
+ }
+ set_fs(old_fs);
+
+ if (ret)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(probe_user_write);
+
+/**
* strncpy_from_user_nofault: - Copy a NUL terminated string from unsafe user
* address.
* @dst: Destination address, in kernel space. This buffer must be at
_
Patches currently in -mm which might be from hch@xxxxxx are
amdgpu-a-null-mm-does-not-mean-a-thread-is-a-kthread.patch
kernel-move-use_mm-unuse_mm-to-kthreadc.patch
kernel-move-use_mm-unuse_mm-to-kthreadc-v2.patch
kernel-better-document-the-use_mm-unuse_mm-api-contract.patch
kernel-better-document-the-use_mm-unuse_mm-api-contract-v2.patch
kernel-set-user_ds-in-kthread_use_mm.patch
