x86: microcode_amd: fix compile warning

Impact: fix build warning

  CC      arch/x86/kernel/microcode_amd.o
arch/x86/kernel/microcode_amd.c: In function ‘request_microcode_fw’:
arch/x86/kernel/microcode_amd.c:393: warning: passing argument 2 of ‘generic_load_microcode’ discards qualifiers from pointer target type

(Respect "const" qualifier of firmware->data.)

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 9 deletions

diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index a8a0ec600554..89b386c901fd 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -225,8 +225,8 @@ static void apply_microcode_amd(int cpu)
         uci->cpu_sig.rev = rev;
 }
 
-static void *get_next_ucode(u8 *buf, unsigned int size,
-                        int (*get_ucode_data)(void *, const void *, size_t),
+static void *get_next_ucode(const u8 *buf, unsigned int size,
+                        int (*get_ucode_data)(void *, const u8 *, size_t),
                         unsigned int *mc_size)
 {
         unsigned int total_size;
@@ -268,8 +268,8 @@ static void *get_next_ucode(u8 *buf, unsigned int size,
 }
 
 
-static int install_equiv_cpu_table(u8 *buf,
-                int (*get_ucode_data)(void *, const void *, size_t))
+static int install_equiv_cpu_table(const u8 *buf,
+                int (*get_ucode_data)(void *, const u8 *, size_t))
 {
 #define UCODE_CONTAINER_HEADER_SIZE     12
         u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
@@ -311,11 +311,13 @@ static void free_equiv_cpu_table(void)
         }
 }
 
-static int generic_load_microcode(int cpu, void *data, size_t size,
-                int (*get_ucode_data)(void *, const void *, size_t))
+static int generic_load_microcode(int cpu, const u8 *data, size_t size,
+                int (*get_ucode_data)(void *, const u8 *, size_t))
 {
         struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-        u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+        const u8 *ucode_ptr = data;
+        void *new_mc = NULL;
+        void *mc;
         int new_rev = uci->cpu_sig.rev;
         unsigned int leftover;
         unsigned long offset;
@@ -368,7 +370,7 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
         return (int)leftover;
 }
 
-static int get_ucode_fw(void *to, const void *from, size_t n)
+static int get_ucode_fw(void *to, const u8 *from, size_t n)
 {
         memcpy(to, from, n);
         return 0;
@@ -390,7 +392,7 @@ static int request_microcode_fw(int cpu, struct device *device)
                 return ret;
         }
 
-        ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
+        ret = generic_load_microcode(cpu, firmware->data, firmware->size,
                         &get_ucode_fw);
 
         release_firmware(firmware);