[openwrt/openwrt] lantiq: ltq-adsl: add kernel 5.10 compatiblity

[LEDE Commits]

mkresin pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/edbbec1bdd0a94e32f9bb6169dd7ec9e4da7c201

commit edbbec1bdd0a94e32f9bb6169dd7ec9e4da7c201
Author: Mathias Kresin <dev at kresin.me>
AuthorDate: Sun Jan 3 19:48:56 2021 +0100

    lantiq: ltq-adsl: add kernel 5.10 compatiblity
    
    The pgprot argument to __vmalloc is always PAGE_KERNEL now and was
    removed.
    
    Signed-off-by: Mathias Kresin <dev at kresin.me>
---
 package/kernel/lantiq/ltq-adsl/patches/150-linux_5.9.patch | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/package/kernel/lantiq/ltq-adsl/patches/150-linux_5.9.patch b/package/kernel/lantiq/ltq-adsl/patches/150-linux_5.9.patch
new file mode 100644
index 0000000000..f07dae97c0
--- /dev/null
+++ b/package/kernel/lantiq/ltq-adsl/patches/150-linux_5.9.patch
@@ -0,0 +1,14 @@
+--- a/src/common/drv_dsl_cpe_os_linux.c
++++ b/src/common/drv_dsl_cpe_os_linux.c
+@@ -417,7 +417,11 @@ int DSL_DRV_ErrorToOS(DSL_Error_t nError
+ DSL_void_t* DSL_DRV_VMalloc(
+    DSL_DRV_size_t    nSize)
+ {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5,9,0)
+    return __vmalloc((unsigned long)nSize, GFP_KERNEL, PAGE_KERNEL);
++#else
++   return __vmalloc((unsigned long)nSize, GFP_KERNEL);
++#endif
+    /*   return vmalloc(nSize);*/
+ }
+