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x86/vdso: Renames variable to fix shadow warning.

PATCH In review Leonardo Brás 2 participants 3 messages Oct 23, 2018 – Oct 24, 2018

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#0 lore raw

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

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

---
 arch/x86/entry/vdso/vdso2c.h | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)
arch/x86/entry/vdso/vdso2c.h +7 -6
index fa847a620f40..a20b134de2a8 100644
@@ -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) {
Signature · 1 line
2.19.1
#1 lore raw
Quoted 6 lines · Leonardo Brás

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 <[email protected]>

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.

#2 lore raw

Hello Andy,

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

Thank you!

Quoted 3 lines · Andy Lutomirski

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 <[email protected]