The patch titled
kernel: add clamp() and clamp_t() macros
has been removed from the -mm tree. Its filename was
kernel-add-clamp-and-clamp_t-macros.patch
This patch was dropped because an updated version will be merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kernel: add clamp() and clamp_t() macros
From: Harvey Harrison <harvey.harrison@xxxxxxxxx>
Adds macros similar to min/max/min_t/max_t.
Also, change the variable names used in the min/max macros to avoid shadowed
variable warnings when min/max min_t/max_t are nested.
Small formatting changes to make all the macros have a similar form.
[akpm@xxxxxxxxxxxxxxxxxxxx: coding-style fixes]
[akpm@xxxxxxxxxxxxxxxxxxxx: fix v4l build]
Signed-off-by: Harvey Harrison <harvey.harrison@xxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/media/video/bt8xx/bttvp.h | 2
drivers/media/video/usbvideo/vicam.c | 6 --
include/linux/kernel.h | 56 ++++++++++++++++---------
3 files changed, 38 insertions(+), 26 deletions(-)
diff -puN include/linux/kernel.h~kernel-add-clamp-and-clamp_t-macros include/linux/kernel.h
--- a/include/linux/kernel.h~kernel-add-clamp-and-clamp_t-macros
+++ a/include/linux/kernel.h
@@ -334,33 +334,53 @@ extern void print_hex_dump_bytes(const c
#endif /* __LITTLE_ENDIAN */
/*
- * min()/max() macros that also do
+ * min()/max()/clamp() macros that also do
* strict type-checking.. See the
* "unnecessary" pointer comparison.
*/
-#define min(x,y) ({ \
- typeof(x) _x = (x); \
- typeof(y) _y = (y); \
- (void) (&_x == &_y); \
- _x < _y ? _x : _y; })
-
-#define max(x,y) ({ \
- typeof(x) _x = (x); \
- typeof(y) _y = (y); \
- (void) (&_x == &_y); \
- _x > _y ? _x : _y; })
+#define min(x,y) ({ \
+ typeof(x) _min1 = (x); \
+ typeof(y) _min2 = (y); \
+ (void) (&_min1 == &_min2); \
+ _min1 < _min2 ? _min1 : _min2; })
+
+#define max(x,y) ({ \
+ typeof(x) _max1 = (x); \
+ typeof(y) _max2 = (y); \
+ (void) (&_max1 == &_max2); \
+ _max1 > _max2 ? _max1 : _max2; })
+
+#define clamp(val, min, max) ({ \
+ typeof(val) __val = (val); \
+ typeof(min) __min = (min); \
+ typeof(max) __max = (max); \
+ (void) (&__val == &__min); \
+ (void) (&__val == &__max); \
+ __val = __val < __min ? __min: __val; \
+ __val > __max ? __max: __val; })
/*
* ..and if you can't take the strict
* types, you can specify one yourself.
*
- * Or not use min/max at all, of course.
+ * Or not use min/max/clamp at all, of course.
*/
-#define min_t(type,x,y) \
- ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
-#define max_t(type,x,y) \
- ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
-
+#define min_t(type, x, y) ({ \
+ type __min1 = (x); \
+ type __min2 = (y); \
+ __min1 < __min2 ? __min1: __min2; })
+
+#define max_t(type, x, y) ({ \
+ type __max1 = (x); \
+ type __max2 = (y); \
+ __max1 > __max2 ? __max1: __max2; })
+
+#define clamp_t(type, val, min, max) ({ \
+ type __val = (val); \
+ type __min = (min); \
+ type __max = (max); \
+ __val = __val < __min ? __min: __val; \
+ __val > __max ? __max: __val; })
/**
* container_of - cast a member of a structure out to the containing structure
diff -puN drivers/media/video/bt8xx/bttvp.h~kernel-add-clamp-and-clamp_t-macros drivers/media/video/bt8xx/bttvp.h
--- a/drivers/media/video/bt8xx/bttvp.h~kernel-add-clamp-and-clamp_t-macros
+++ a/drivers/media/video/bt8xx/bttvp.h
@@ -82,8 +82,6 @@
/* Limits scaled width, which must be a multiple of 4. */
#define MAX_HACTIVE (0x3FF & -4)
-#define clamp(x, low, high) min (max (low, x), high)
-
#define BTTV_NORMS (\
V4L2_STD_PAL | V4L2_STD_PAL_N | \
V4L2_STD_PAL_Nc | V4L2_STD_SECAM | \
diff -puN drivers/media/video/usbvideo/vicam.c~kernel-add-clamp-and-clamp_t-macros drivers/media/video/usbvideo/vicam.c
--- a/drivers/media/video/usbvideo/vicam.c~kernel-add-clamp-and-clamp_t-macros
+++ a/drivers/media/video/usbvideo/vicam.c
@@ -70,12 +70,6 @@
#define VICAM_HEADER_SIZE 64
-#define clamp( x, l, h ) max_t( __typeof__( x ), \
- ( l ), \
- min_t( __typeof__( x ), \
- ( h ), \
- ( x ) ) )
-
/* Not sure what all the bytes in these char
* arrays do, but they're necessary to make
* the camera work.
_
Patches currently in -mm which might be from harvey.harrison@xxxxxxxxx are
origin.patch
git-x86.patch
git-acpi.patch
git-alsa-tiwai.patch
agp-fix-shadowed-variable-warning-in-amd-k7-agpc.patch
git-cifs.patch
cifs-remove-global_extern-macro.patch
powerpc-replace-remaining-__function__-occurences.patch
ppc-replace-remaining-__function__-occurences.patch
radeon-fix-integer-as-null-pointer-warnings-in-radeon_memc.patch
git-dvb.patch
git-dlm.patch
git-ieee1394.patch
infiniband-replace-remaining-__function__-occurrences.patch
input-replace-remaining-__function__-occurrences.patch
git-jfs.patch
git-kvm.patch
pata_amd-fix-sparse-warning.patch
git-async-tx.patch
git-mips.patch
mips-replace-remaining-__function__-occurences.patch
jffs2-include-function-prototype-for-jffs2_ioctl.patch
jffs2-fix-sparse-warning-in-nodemgmtc.patch
jffs2-fix-sparse-warning-in-writec.patch
jffs2-fix-sparse-warnings-in-gcc.patch
mtd-replace-remaining-__function__-occurrences.patch
blackfin-replace-remaining-__function__-occurences.patch
nfs-replace-remaining-__function__-occurrences.patch
git-nfsd.patch
parisc-replace-remaining-__function__-occurences.patch
drivers-parisc-replace-remaining-__function__-occurrences.patch
pcmcia-replace-remaining-__function__-occurrences.patch
git-selinux.patch
drivers-s390-replace-remaining-__function__-occurrences.patch
scsi-replace-remaining-__function__-occurrences.patch
fusion-replace-remaining-__function__-occurrences.patch
scsi-replace-__inline-with-inline.patch
scsi-chc-fix-shadowed-variable-warnings.patch
scsi-chc-fix-shadowed-variable-warnings-checkpatch-fixes.patch
block-replace-remaining-__function__-occurrences.patch
git-watchdog.patch
xfs-replace-remaining-__function__-occurrences.patch
xfs-replace-__inline-with-inline.patch
xtensa-replace-remaining-__function__-occurences.patch
remove-sparse-warning-for-mmzoneh.patch
remove-sparse-warning-for-mmzoneh-checkpatch-fixes.patch
smack-fix-integer-as-null-pointer-warning-in-smack_lsmc.patch
alpha-remove-remaining-__function__-occurences.patch
alpha-replace-__inline-with-inline.patch
power-replace-remaining-__function__-occurrences.patch
m68k-replace-remaining-__function__-occurences.patch
uml-replace-remaining-__function__-occurences.patch
adfs-work-around-bogus-sparse-warning.patch
coda-add-static-to-functions-in-dirc.patch
befs-fix-sparse-warning-in-linuxvfsc.patch
autofs4-fix-sparse-warning-in-rootc.patch
kernel-add-clamp-and-clamp_t-macros.patch
firmware-replace-remaining-__function__-occurrences.patch
drivers-misc-replace-remaining-__function__-occurrences.patch
ioc3c-replace-remaining-__function__-occurrences.patch
ncpfs-add-prototypes-to-ncp_fsh.patch
ncpfs-fix-sparse-warnings-in-ioctlc.patch
ncpfs-fix-sparse-warning-in-ncpsign_kernelc.patch
serial-remove-double-initializer.patch
char-make-functions-static-in-synclinkmpc.patch
spi-replace-remaining-__function__-occurrences.patch
capi-fix-sparse-warnings-using-integer-as-null-pointer.patch
avm-fix-sparse-warning-using-integer-as-null-pointer.patch
eicon-fix-sparse-integer-as-null-pointer-warnings.patch
isdn-replace-remaining-__function__-occurrences.patch
xen-make-blkif_getgeo-static.patch
ecryptfs-replace-remaining-__function__-occurrences.patch
rtc-replace-remaining-__function__-occurrences.patch
fbcon-replace-mono_col-macro-with-static-inline.patch
fbcon-replace-mono_col-macro-with-static-inline-fix.patch
video-replace-remaining-__function__-occurrences.patch
md-fix-integer-as-null-pointer-warnings-in-mdc.patch
md-replace-remaining-__function__-occurrences.patch
ext2-replace-remaining-__function__-occurrences.patch
jbd-sparse-warnings-in-revokec-journalc.patch
ext3-replace-remaining-__function__-occurrences.patch
jbd-replace-remaining-__function__-occurrences.patch
ufs-replace-remaining-__function__-occurrences.patch
ufs-replace-__inline-with-inline.patch
udf-fix-sparse-warning-in-nameic.patch
reiserfs-fix-sparse-warnings-in-fix_nodec.patch
reiserfs-fix-sparse-warnings-in-do_balanc.patch
reiserfs-fix-sparse-warning-in-nameic.patch
reiserfs-fix-sparse-warnings-in-lbalancec.patch
reiserfs-fix-sparse-warning-in-journalc.patch
reiserfs-fix-more-sparse-warnings-in-do_balanc.patch
reiserfs-replace-remaining-__function__-occurrences.patch
cgroup-fix-sparse-warning-of-shadow-symbol-in-cgroupc.patch
ext4-replace-remaining-__function__-occurrences.patch
jdb2-replace-remaining-__function__-occurrences.patch
char-fix-sparse-shadowed-variable-warnings-in-espc.patch
char-espc-fix-possible-double-unlock.patch
char-rocketc-fix-sparse-variable-shadowing-and-int-as-null-pointer.patch
cycladesc-fix-sparse-shadowed-variable-warnings.patch
epcac-static-functions-and-integer-as-null-pointer-fixes.patch
epcac-static-functions-and-integer-as-null-pointer-fixes-checkpatch-fixes.patch
drivers-replace-remaining-__function__-occurrences.patch
mm-remove-remaining-__function__-occurances.patch
block-remove-remaining-__function__-occurances.patch
kernel-replace-remaining-__function__-occurances.patch
lib-replace-remaining-__function__-occurances.patch
afs-replace-remaining-__function__-occurrences.patch
fs-replace-remaining-__function__-occurrences.patch
drivers-char-replace-remaining-__function__-occurrences.patch
serial-replace-remaining-__function__-occurrences.patch
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