Fix riscv compile error in fs/proc/kcore.c

BUILDSTDERR: fs/proc/kcore.c: In function 'read_kcore':
BUILDSTDERR: fs/proc/kcore.c:510:8: error: implicit declaration of function 'kern_addr_valid'; did you mean 'virt_addr_valid'? [-Werror=implicit-function-declaration]
BUILDSTDERR:   510 |    if (kern_addr_valid(start)) {
BUILDSTDERR:       |        ^~~~~~~~~~~~~~~
BUILDSTDERR:       |        virt_addr_valid

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

0001-riscv-make-kern_addr_valid-available-without-CONFIG_.patch

@@ -0,0 +1,26 @@
+From 634c24af79a94122e32554e49e5c08b6e3b8036b Mon Sep 17 00:00:00 2001
+From: Fedora Kernel Team <kernel-team@fedoraproject.org>
+Date: Sat, 19 Oct 2019 20:32:35 +0000
+Subject: [PATCH] riscv: make kern_addr_valid available without CONFIG_FLATMEM
+
+---
+ arch/riscv/include/asm/pgtable.h | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
+index 7255f2d..644532c 100644
+--- a/arch/riscv/include/asm/pgtable.h
++++ b/arch/riscv/include/asm/pgtable.h
+@@ -428,9 +428,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
+ #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
+ #define __swp_entry_to_pte(x)	((pte_t) { (x).val })
+ 
+-#ifdef CONFIG_FLATMEM
+ #define kern_addr_valid(addr)   (1) /* FIXME */
+-#endif
+ 
+ extern void *dtb_early_va;
+ extern void setup_bootmem(void);
+-- 
+2.23.0
+

kernel.spec

@@ -588,6 +588,10 @@ Patch550: 0001-riscv-add-support-for-SECCOMP.patch
 # https://github.com/sifive/riscv-linux/commits/dev/paulw/cpufreq-dt-aloe-v5.3-rc4
 Patch552: 0002-SiFive-Unleashed-CPUFreq.patch
 
+# RISC-V
+# Not upstream, not posted
+Patch553: 0001-riscv-make-kern_addr_valid-available-without-CONFIG_.patch
+
 # END OF PATCH DEFINITIONS
 
 %endif