[PATCH 02/15] ftrace/trivial: Clean up recordmcount.c to use Linux style

Steven Rostedt
2011-05-18T16:09:13Z

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From: Steven Rostedt <srostedt@redhat.com>

The Linux ftrace subsystem style for comparing is:

var == 1
var > 0

and not:

1 == var
0 < var

It is considered that Linux developers are smart enough not to do the

if (var = 1)

mistake.

Cc: John Reiser <jreiser@bitwagon.com>
Link: http://lkml.kernel.org/r/20110421023737.290712238@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
scripts/recordmcount.c | 48 ++++++++++++++++++++++++------------------------
scripts/recordmcount.h | 16 ++++++++--------
2 files changed, 32 insertions(+), 32 deletions(-)

diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index f9f6f52..37afe0e 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -78,7 +78,7 @@ static off_t
ulseek(int const fd, off_t const offset, int const whence)
{
off_t const w = lseek(fd, offset, whence);
- if ((off_t)-1 == w) {
+ if (w == (off_t)-1) {
perror("lseek");
fail_file();
}
@@ -111,7 +111,7 @@ static void *
umalloc(size_t size)
{
void *const addr = malloc(size);
- if (0 == addr) {
+ if (addr == 0) {
fprintf(stderr, "malloc failed: %zu bytes\n", size);
fail_file();
}
@@ -136,7 +136,7 @@ static void *mmap_file(char const *fname)
void *addr;

fd_map = open(fname, O_RDWR);
- if (0 > fd_map || 0 > fstat(fd_map, &sb)) {
+ if (fd_map < 0 || fstat(fd_map, &sb) < 0) {
perror(fname);
fail_file();
}
@@ -147,7 +147,7 @@ static void *mmap_file(char const *fname)
addr = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_PRIVATE,
fd_map, 0);
mmap_failed = 0;
- if (MAP_FAILED == addr) {
+ if (addr == MAP_FAILED) {
mmap_failed = 1;
addr = umalloc(sb.st_size);
uread(fd_map, addr, sb.st_size);
@@ -206,12 +206,12 @@ static uint32_t (*w2)(uint16_t);
static int
is_mcounted_section_name(char const *const txtname)
{
- return 0 == strcmp(".text", txtname) ||
- 0 == strcmp(".ref.text", txtname) ||
- 0 == strcmp(".sched.text", txtname) ||
- 0 == strcmp(".spinlock.text", txtname) ||
- 0 == strcmp(".irqentry.text", txtname) ||
- 0 == strcmp(".text.unlikely", txtname);
+ return strcmp(".text", txtname) == 0 ||
+ strcmp(".ref.text", txtname) == 0 ||
+ strcmp(".sched.text", txtname) == 0 ||
+ strcmp(".spinlock.text", txtname) == 0 ||
+ strcmp(".irqentry.text", txtname) == 0 ||
+ strcmp(".text.unlikely", txtname) == 0;
}

/* 32 bit and 64 bit are very similar */
@@ -270,7 +270,7 @@ do_file(char const *const fname)
fail_file();
} break;
case ELFDATA2LSB: {
- if (1 != *(unsigned char const *)&endian) {
+ if (*(unsigned char const *)&endian != 1) {
/* main() is big endian, file.o is little endian. */
w = w4rev;
w2 = w2rev;
@@ -278,7 +278,7 @@ do_file(char const *const fname)
}
} break;
case ELFDATA2MSB: {
- if (0 != *(unsigned char const *)&endian) {
+ if (*(unsigned char const *)&endian != 0) {
/* main() is little endian, file.o is big endian. */
w = w4rev;
w2 = w2rev;
@@ -286,9 +286,9 @@ do_file(char const *const fname)
}
} break;
} /* end switch */
- if (0 != memcmp(ELFMAG, ehdr->e_ident, SELFMAG)
- || ET_REL != w2(ehdr->e_type)
- || EV_CURRENT != ehdr->e_ident[EI_VERSION]) {
+ if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0
+ || w2(ehdr->e_type) != ET_REL
+ || ehdr->e_ident[EI_VERSION] != EV_CURRENT) {
fprintf(stderr, "unrecognized ET_REL file %s\n", fname);
fail_file();
}
@@ -321,15 +321,15 @@ do_file(char const *const fname)
fail_file();
} break;
case ELFCLASS32: {
- if (sizeof(Elf32_Ehdr) != w2(ehdr->e_ehsize)
- || sizeof(Elf32_Shdr) != w2(ehdr->e_shentsize)) {
+ if (w2(ehdr->e_ehsize) != sizeof(Elf32_Ehdr)
+ || w2(ehdr->e_shentsize) != sizeof(Elf32_Shdr)) {
fprintf(stderr,
"unrecognized ET_REL file: %s\n", fname);
fail_file();
}
- if (EM_S390 == w2(ehdr->e_machine))
+ if (w2(ehdr->e_machine) == EM_S390)
reltype = R_390_32;
- if (EM_MIPS == w2(ehdr->e_machine)) {
+ if (w2(ehdr->e_machine) == EM_MIPS) {
reltype = R_MIPS_32;
is_fake_mcount32 = MIPS32_is_fake_mcount;
}
@@ -337,15 +337,15 @@ do_file(char const *const fname)
} break;
case ELFCLASS64: {
Elf64_Ehdr *const ghdr = (Elf64_Ehdr *)ehdr;
- if (sizeof(Elf64_Ehdr) != w2(ghdr->e_ehsize)
- || sizeof(Elf64_Shdr) != w2(ghdr->e_shentsize)) {
+ if (w2(ghdr->e_ehsize) != sizeof(Elf64_Ehdr)
+ || w2(ghdr->e_shentsize) != sizeof(Elf64_Shdr)) {
fprintf(stderr,
"unrecognized ET_REL file: %s\n", fname);
fail_file();
}
- if (EM_S390 == w2(ghdr->e_machine))
+ if (w2(ghdr->e_machine) == EM_S390)
reltype = R_390_64;
- if (EM_MIPS == w2(ghdr->e_machine)) {
+ if (w2(ghdr->e_machine) == EM_MIPS) {
reltype = R_MIPS_64;
Elf64_r_sym = MIPS64_r_sym;
Elf64_r_info = MIPS64_r_info;
@@ -371,7 +371,7 @@ main(int argc, char const *argv[])
}

/* Process each file in turn, allowing deep failure. */
- for (--argc, ++argv; 0 < argc; --argc, ++argv) {
+ for (--argc, ++argv; argc > 0; --argc, ++argv) {
int const sjval = setjmp(jmpenv);
int len;

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index baf187b..ac7b330 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -275,12 +275,12 @@ static uint_t *sift_rel_mcount(uint_t *mlocp,
Elf_Sym const *const symp =
&sym0[Elf_r_sym(relp)];
char const *symname = &str0[w(symp->st_name)];
- char const *mcount = '_' == gpfx ? "_mcount" : "mcount";
+ char const *mcount = gpfx == '_' ? "_mcount" : "mcount";

- if ('.' == symname[0])
+ if (symname[0] == '.')
++symname; /* ppc64 hack */
- if (0 == strcmp(mcount, symname) ||
- (altmcount && 0 == strcmp(altmcount, symname)))
+ if (strcmp(mcount, symname) == 0 ||
+ (altmcount && strcmp(altmcount, symname) == 0))
mcountsym = Elf_r_sym(relp);
}

@@ -290,7 +290,7 @@ static uint_t *sift_rel_mcount(uint_t *mlocp,
mrelp->r_offset = _w(offbase
+ ((void *)mlocp - (void *)mloc0));
Elf_r_info(mrelp, recsym, reltype);
- if (sizeof(Elf_Rela) == rel_entsize) {
+ if (rel_entsize == sizeof(Elf_Rela)) {
((Elf_Rela *)mrelp)->r_addend = addend;
*mlocp++ = 0;
} else
@@ -354,12 +354,12 @@ __has_rel_mcount(Elf_Shdr const *const relhdr, /* is SHT_REL or SHT_RELA */
Elf_Shdr const *const txthdr = &shdr0[w(relhdr->sh_info)];
char const *const txtname = &shstrtab[w(txthdr->sh_name)];

- if (0 == strcmp("__mcount_loc", txtname)) {
+ if (strcmp("__mcount_loc", txtname) == 0) {
fprintf(stderr, "warning: __mcount_loc already exists: %s\n",
fname);
succeed_file();
}
- if (SHT_PROGBITS != w(txthdr->sh_type) ||
+ if (w(txthdr->sh_type) != SHT_PROGBITS ||
!is_mcounted_section_name(txtname))
return NULL;
return txtname;
@@ -370,7 +370,7 @@ static char const *has_rel_mcount(Elf_Shdr const *const relhdr,
char const *const shstrtab,
char const *const fname)
{
- if (SHT_REL != w(relhdr->sh_type) && SHT_RELA != w(relhdr->sh_type))
+ if (w(relhdr->sh_type) != SHT_REL && w(relhdr->sh_type) != SHT_RELA)
return NULL;
return __has_rel_mcount(relhdr, shdr0, shstrtab, fname);
}
--
1.7.4.4