linux-kernel - [tip: x86/vdso] x86/vdso/vdso2c: Convert iterators to unsigned

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Date:   Tue, 21 Apr 2020 18:37:21 -0000
From:   "tip-bot2 for Dmitry Safonov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Andrei Vagin <avagin@...nvz.org>, Dmitry Safonov <dima@...sta.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/vdso] x86/vdso/vdso2c: Convert iterators to unsigned

The following commit has been merged into the x86/vdso branch of tip:

Commit-ID:     833e55bb99bce116682efb94870b5c9f8a66f6af
Gitweb:        https://git.kernel.org/tip/833e55bb99bce116682efb94870b5c9f8a66f6af
Author:        Dmitry Safonov <dima@...sta.com>
AuthorDate:    Mon, 20 Apr 2020 19:32:55 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 21 Apr 2020 20:33:16 +02:00

x86/vdso/vdso2c: Convert iterators to unsigned

`i` and `j` are used everywhere with unsigned types.

Convert `i` to unsigned long in order to avoid signed to unsigned
comparisons.  Convert `k` to unsigned int with the same purpose.
Also, drop `j` as `i` could be used in place of it.
Introduce syms_nr for readability.

Co-developed-by: Andrei Vagin <avagin@...nvz.org>
Signed-off-by: Andrei Vagin <avagin@...nvz.org>
Signed-off-by: Dmitry Safonov <dima@...sta.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Andy Lutomirski <luto@...nel.org>
Link: https://lkml.kernel.org/r/20200420183256.660371-4-dima@arista.com

---
 arch/x86/entry/vdso/vdso2c.h | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/arch/x86/entry/vdso/vdso2c.h b/arch/x86/entry/vdso/vdso2c.h
index a20b134..6f46e11 100644
--- a/arch/x86/entry/vdso/vdso2c.h
+++ b/arch/x86/entry/vdso/vdso2c.h
@@ -13,8 +13,7 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 	unsigned long load_size = -1;  /* Work around bogus warning */
 	unsigned long mapping_size;
 	ELF(Ehdr) *hdr = (ELF(Ehdr) *)raw_addr;
-	int i;
-	unsigned long j;
+	unsigned long i, syms_nr;
 	ELF(Shdr) *symtab_hdr = NULL, *strtab_hdr, *secstrings_hdr,
 		*alt_sec = NULL;
 	ELF(Dyn) *dyn = 0, *dyn_end = 0;
@@ -86,11 +85,10 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 	strtab_hdr = raw_addr + GET_LE(&hdr->e_shoff) +
 		GET_LE(&hdr->e_shentsize) * GET_LE(&symtab_hdr->sh_link);
 
+	syms_nr = GET_LE(&symtab_hdr->sh_size) / GET_LE(&symtab_hdr->sh_entsize);
 	/* Walk the symbol table */
-	for (i = 0;
-	     i < GET_LE(&symtab_hdr->sh_size) / GET_LE(&symtab_hdr->sh_entsize);
-	     i++) {
-		int k;
+	for (i = 0; i < syms_nr; i++) {
+		unsigned int k;
 		ELF(Sym) *sym = raw_addr + GET_LE(&symtab_hdr->sh_offset) +
 			GET_LE(&symtab_hdr->sh_entsize) * i;
 		const char *sym_name = raw_addr +
@@ -150,11 +148,11 @@ static void BITSFUNC(go)(void *raw_addr, size_t raw_len,
 	fprintf(outfile,
 		"static unsigned char raw_data[%lu] __ro_after_init __aligned(PAGE_SIZE) = {",
 		mapping_size);
-	for (j = 0; j < stripped_len; j++) {
-		if (j % 10 == 0)
+	for (i = 0; i < stripped_len; i++) {
+		if (i % 10 == 0)
 			fprintf(outfile, "\n\t");
 		fprintf(outfile, "0x%02X, ",
-			(int)((unsigned char *)stripped_addr)[j]);
+			(int)((unsigned char *)stripped_addr)[i]);
 	}
 	fprintf(outfile, "\n};\n\n");