powerpc: Use 'struct func_desc' instead of 'struct ppc64_opd_entry'

'struct ppc64_opd_entry' is somehow redundant with 'struct func_desc',
the later is more correct/complete as it includes the third
field which is unused.

So use 'struct func_desc' instead of 'struct ppc64_opd_entry'

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/34e76bac6cbe95a63ecd37df69fb7feb93b0ea7c.1644928018.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/include/asm/sections.h b/arch/powerpc/include/asm/sections.h
index 38f79e4..baca39f 100644 (file)
--- a/arch/powerpc/include/asm/sections.h
+++ b/arch/powerpc/include/asm/sections.h
@@ -61,10 +61,10 @@ static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
 #undef dereference_function_descriptor
 static inline void *dereference_function_descriptor(void *ptr)
 {
-       struct ppc64_opd_entry *desc = ptr;
+       struct func_desc *desc = ptr;
        void *p;
 
-       if (!get_kernel_nofault(p, (void *)&desc->funcaddr))
+       if (!get_kernel_nofault(p, (void *)&desc->addr))
                ptr = p;
        return ptr;
 }

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 5d77d3f..d2082f2 100644 (file)
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -64,19 +64,19 @@ static unsigned int local_entry_offset(const Elf64_Sym *sym)
 #else
 
 /* An address is address of the OPD entry, which contains address of fn. */
-typedef struct ppc64_opd_entry func_desc_t;
+typedef struct func_desc func_desc_t;
 
 static func_desc_t func_desc(unsigned long addr)
 {
-       return *(struct ppc64_opd_entry *)addr;
+       return *(struct func_desc *)addr;
 }
 static unsigned long func_addr(unsigned long addr)
 {
-       return func_desc(addr).funcaddr;
+       return func_desc(addr).addr;
 }
 static unsigned long stub_func_addr(func_desc_t func)
 {
-       return func.funcaddr;
+       return func.addr;
 }
 static unsigned int local_entry_offset(const Elf64_Sym *sym)
 {
@@ -187,7 +187,7 @@ static int relacmp(const void *_x, const void *_y)
 static unsigned long get_stubs_size(const Elf64_Ehdr *hdr,
                                    const Elf64_Shdr *sechdrs)
 {
-       /* One extra reloc so it's always 0-funcaddr terminated */
+       /* One extra reloc so it's always 0-addr terminated */
        unsigned long relocs = 1;
        unsigned i;