Commit 71c47b01 authored by Paolo Bonzini's avatar Paolo Bonzini

checkpatch: adapt some tests to QEMU

Mostly change severity levels, but some tests can also be adjusted to refer
to QEMU APIs or data structures.
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 690a35e1
......@@ -152,33 +152,18 @@ our $Sparse = qr{
}x;
# Notes to $Attribute:
# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
our $Attribute = qr{
const|
__percpu|
__nocast|
__safe|
__bitwise__|
__packed__|
__packed2__|
__naked|
__maybe_unused|
__always_unused|
__noreturn|
__used|
__cold|
__noclone|
__deprecated|
__read_mostly|
__kprobes|
__(?:mem|cpu|dev|)(?:initdata|initconst|init\b)|
____cacheline_aligned|
____cacheline_aligned_in_smp|
____cacheline_internodealigned_in_smp|
__weak
volatile|
QEMU_NORETURN|
QEMU_WARN_UNUSED_RESULT|
QEMU_SENTINEL|
QEMU_ARTIFICIAL|
QEMU_PACKED|
GCC_FMT_ATTR
}x;
our $Modifier;
our $Inline = qr{inline|__always_inline|noinline};
our $Inline = qr{inline};
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
our $Lval = qr{$Ident(?:$Member)*};
......@@ -1367,7 +1352,7 @@ sub process {
# Check for incorrect file permissions
if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
my $permhere = $here . "FILE: $realfile\n";
if ($realfile =~ /(Makefile|Kconfig|\.c|\.cpp|\.h|\.S|\.tmpl)$/) {
if ($realfile =~ /(\bMakefile(?:\.objs)?|\.c|\.cc|\.cpp|\.h|\.mak|\.[sS])$/) {
ERROR("do not set execute permissions for source files\n" . $permhere);
}
}
......@@ -1947,9 +1932,14 @@ sub process {
ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
}
# ... however, open braces on typedef lines should be avoided.
if ($line =~ /^.\s*typedef\s+(enum|union|struct)(?:\s+$Ident\b)?.*[^;]$/) {
ERROR("typedefs should be separate from struct declaration\n" . $herecurr);
}
# missing space after union, struct or enum definition
if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?(?:\s+$Ident)?[=\{]/) {
WARN("missing space after $1 definition\n" . $herecurr);
ERROR("missing space after $1 definition\n" . $herecurr);
}
# check for spacing round square brackets; allowed:
......@@ -2267,7 +2257,7 @@ sub process {
if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
my $name = $1;
if ($name ne 'EOF' && $name ne 'ERROR') {
CHK("return of an errno should typically be -ve (return -$1)\n" . $herecurr);
WARN("return of an errno should typically be -ve (return -$1)\n" . $herecurr);
}
}
......@@ -2671,15 +2661,15 @@ sub process {
# warn about #if 0
if ($line =~ /^.\s*\#\s*if\s+0\b/) {
CHK("if this code is redundant consider removing it\n" .
WARN("if this code is redundant consider removing it\n" .
$herecurr);
}
# check for needless kfree() checks
# check for needless g_free() checks
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
my $expr = $1;
if ($line =~ /\bkfree\(\Q$expr\E\);/) {
WARN("kfree(NULL) is safe this check is probably not required\n" . $hereprev);
if ($line =~ /\bg_free\(\Q$expr\E\);/) {
WARN("g_free(NULL) is safe this check is probably not required\n" . $hereprev);
}
}
# check for needless usb_free_urb() checks
......@@ -2726,14 +2716,16 @@ sub process {
}
}
# check for memory barriers without a comment.
if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
if ($line =~ /\b(smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
if (!ctx_has_comment($first_line, $linenr)) {
CHK("memory barrier without comment\n" . $herecurr);
WARN("memory barrier without comment\n" . $herecurr);
}
}
# check of hardware specific defines
if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
CHK("architecture specific defines should be avoided\n" . $herecurr);
# we have e.g. CONFIG_LINUX and CONFIG_WIN32 for common cases
# where they might be necessary.
if ($line =~ m@^.\s*\#\s*if.*\b__@) {
WARN("architecture specific defines should be avoided\n" . $herecurr);
}
# Check that the storage class is at the beginning of a declaration
......@@ -2794,9 +2786,13 @@ sub process {
}
}
# check for pointless casting of kmalloc return
if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
# check for pointless casting of g_malloc return
if ($line =~ /\*\s*\)\s*g_(try)?(m|re)alloc(0?)(_n)?\b/) {
if ($2 == 'm') {
WARN("unnecessary cast may hide bugs, use g_$1new$3 instead\n" . $herecurr);
} else {
WARN("unnecessary cast may hide bugs, use g_$1renew$3 instead\n" . $herecurr);
}
}
# check for gcc specific __FUNCTION__
......@@ -2813,54 +2809,37 @@ sub process {
WARN("consider using a completion\n" . $herecurr);
}
# recommend strict_strto* over simple_strto*
if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
WARN("consider using strict_$1 in preference to simple_$1\n" . $herecurr);
# recommend qemu_strto* over strto*
if ($line =~ /\b(strto.*?)\s*\(/) {
WARN("consider using qemu_$1 in preference to $1\n" . $herecurr);
}
# check for __initcall(), use device_initcall() explicitly please
if ($line =~ /^.\s*__initcall\s*\(/) {
WARN("please use device_initcall() instead of __initcall()\n" . $herecurr);
# check for module_init(), use category-specific init macros explicitly please
if ($line =~ /^module_init\s*\(/) {
WARN("please use block_init(), type_init() etc. instead of module_init()\n" . $herecurr);
}
# check for various ops structs, ensure they are const.
my $struct_ops = qr{acpi_dock_ops|
address_space_operations|
backlight_ops|
block_device_operations|
dentry_operations|
dev_pm_ops|
dma_map_ops|
extent_io_ops|
file_lock_operations|
file_operations|
hv_ops|
ide_dma_ops|
intel_dvo_dev_ops|
item_operations|
iwl_ops|
kgdb_arch|
kgdb_io|
kset_uevent_ops|
lock_manager_operations|
microcode_ops|
mtrr_ops|
neigh_ops|
nlmsvc_binding|
pci_raw_ops|
pipe_buf_operations|
platform_hibernation_ops|
platform_suspend_ops|
proto_ops|
rpc_pipe_ops|
seq_operations|
snd_ac97_build_ops|
soc_pcmcia_socket_ops|
stacktrace_ops|
sysfs_ops|
tty_operations|
usb_mon_operations|
wd_ops}x;
my $struct_ops = qr{AIOCBInfo|
BdrvActionOps|
BlockDevOps|
BlockJobDriver|
DisplayChangeListenerOps|
GraphicHwOps|
IDEDMAOps|
KVMCapabilityInfo|
MemoryRegionIOMMUOps|
MemoryRegionOps|
MemoryRegionPortio|
QEMUFileOps|
SCSIBusInfo|
SCSIReqOps|
Spice[A-Z][a-zA-Z0-9]*Interface|
TPMDriverOps|
USBDesc[A-Z][a-zA-Z0-9]*|
VhostOps|
VMStateDescription|
VMStateInfo}x;
if ($line !~ /\bconst\b/ &&
$line =~ /\bstruct\s+($struct_ops)\b/) {
$line =~ /\b($struct_ops)\b/) {
WARN("struct $1 should normally be const\n" .
$herecurr);
}
......
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