[PATCH v2 1/5] x86/vdso: Renames variable to fix shadow warning.

[PATCH v2 1/5] x86/vdso: Renames variable to fix shadow warning.

[Leonardo Brás]

Renames the char variable to avoid shadowing a variable previously
declared on this function.

Signed-off-by: Leonardo Brás <leobras.c@gmail.com>
---
 arch/x86/entry/vdso/vdso2c.h | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/entry/vdso/vdso2c.h b/arch/x86/entry/vdso/vdso2c.h
index fa847a620f40..a20b134de2a8 100644
--- a/arch/x86/entry/vdso/vdso2c.h
+++ b/arch/x86/entry/vdso/vdso2c.h
@@ -7,7 +7,7 @@
 
 static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 			 void *stripped_addr, size_t stripped_len,
-			 FILE *outfile, const char *name)
+			 FILE *outfile, const char *image_name)
 {
 	int found_load = 0;
 	unsigned long load_size = -1;  /* Work around bogus warning */
@@ -93,11 +93,12 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 		int k;
 		ELF(Sym) *sym = raw_addr + GET_LE(&symtab_hdr->sh_offset) +
 			GET_LE(&symtab_hdr->sh_entsize) * i;
-		const char *name = raw_addr + GET_LE(&strtab_hdr->sh_offset) +
-			GET_LE(&sym->st_name);
+		const char *sym_name = raw_addr +
+				       GET_LE(&strtab_hdr->sh_offset) +
+				       GET_LE(&sym->st_name);
 
 		for (k = 0; k < NSYMS; k++) {
-			if (!strcmp(name, required_syms[k].name)) {
+			if (!strcmp(sym_name, required_syms[k].name)) {
 				if (syms[k]) {
 					fail("duplicate symbol %s\n",
 					     required_syms[k].name);
@@ -134,7 +135,7 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 	if (syms[sym_vvar_start] % 4096)
 		fail("vvar_begin must be a multiple of 4096\n");
 
-	if (!name) {
+	if (!image_name) {
 		fwrite(stripped_addr, stripped_len, 1, outfile);
 		return;
 	}
@@ -157,7 +158,7 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 	}
 	fprintf(outfile, "\n};\n\n");
 
-	fprintf(outfile, "const struct vdso_image %s = {\n", name);
+	fprintf(outfile, "const struct vdso_image %s = {\n", image_name);
 	fprintf(outfile, "\t.data = raw_data,\n");
 	fprintf(outfile, "\t.size = %lu,\n", mapping_size);
 	if (alt_sec) {
-- 
2.19.1

Re: [PATCH v2 1/5] x86/vdso: Renames variable to fix shadow warning.

[Andy Lutomirski]

> On Oct 22, 2018, at 6:10 PM, Leonardo Brás <leobras.c@gmail.com> wrote:
> 
> Renames the char variable to avoid shadowing a variable previously
> declared on this function.

How about “The go32() and go64() functions has an argument and a local variable called ‘name’.  Rename both to clarify the code and to fix a warning with -Wshadow.”

Other than that, Acked-by: Andy Lutomirski <luto@kernel.org>

Ingo or Thomas, it probably makes sense to just apply this to tip:x86/vdso, since it’s an improvement regardless of the fate of the rest of the series.

Re: [PATCH v2 1/5] x86/vdso: Renames variable to fix shadow warning.

[Leonardo Bras]

Hello Andy,

Yeah, it's much better. I will replace this part of the commit message.
It will be fixed for v3.

Thank you!


On Mon, Oct 22, 2018 at 11:13 PM Andy Lutomirski <luto@amacapital.net> wrote:

> How about “The go32() and go64() functions has an argument and a local variable called ‘name’.  Rename both to clarify the code and to fix a warning with -Wshadow.”
>
> Other than that, Acked-by: Andy Lutomirski <luto@kernel.org