[PATCH v3 1/4] limits.h: add UCHAR_MAX, SCHAR_MAX, and SCHAR_MIN

[Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>]

Some drivers already defined these, and they will be used by sscanf()
for overflow checks later.  Also add SSIZE_MIN to limits.h, which will
also be needed later.

Signed-off-by: Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx>
---
 .../media/atomisp/pci/hive_isp_css_include/platform_support.h  | 1 -
 include/linux/limits.h                                         | 1 +
 include/linux/mfd/wl1273-core.h                                | 3 ---
 include/vdso/limits.h                                          | 3 +++
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git 
a/drivers/staging/media/atomisp/pci/hive_isp_css_include/platform_support.h 
b/drivers/staging/media/atomisp/pci/hive_isp_css_include/platform_support.h
index 
0cdef4a5e8b1bed9884133f1a0b9d853d59d43a4..e29b96d8bebf14839f6dd48fdc6c0f8b029ef31d
 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_include/platform_support.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_include/platform_support.h
@@ -27,7 +27,6 @@
 
 #define UINT16_MAX USHRT_MAX
 #define UINT32_MAX UINT_MAX
-#define UCHAR_MAX  (255)
 
 #define CSS_ALIGN(d, a) d __attribute__((aligned(a)))
 
diff --git a/include/linux/limits.h b/include/linux/limits.h
index 
f6bcc936901071f496e3e85bb6e1d93905b12e32..8f7fd85b41fb46e6992d9e5912da00424119227a
 100644
--- a/include/linux/limits.h
+++ b/include/linux/limits.h
@@ -8,6 +8,7 @@
 
 #define SIZE_MAX       (~(size_t)0)
 #define SSIZE_MAX      ((ssize_t)(SIZE_MAX >> 1))
+#define SSIZE_MIN      (-SSIZE_MAX - 1)
 #define PHYS_ADDR_MAX  (~(phys_addr_t)0)
 
 #define U8_MAX         ((u8)~0U)
diff --git a/include/linux/mfd/wl1273-core.h b/include/linux/mfd/wl1273-core.h
index 
c28cf76d5c31ee1c94a9319a2e2d318bf00283a6..b81a229135ed9f756c749122a8341816031c8311
 100644
--- a/include/linux/mfd/wl1273-core.h
+++ b/include/linux/mfd/wl1273-core.h
@@ -204,9 +204,6 @@
                                 WL1273_IS2_TRI_OPT | \
                                 WL1273_IS2_RATE_48K)
 
-#define SCHAR_MIN (-128)
-#define SCHAR_MAX 127
-
 #define WL1273_FR_EVENT                        BIT(0)
 #define WL1273_BL_EVENT                        BIT(1)
 #define WL1273_RDS_EVENT               BIT(2)
diff --git a/include/vdso/limits.h b/include/vdso/limits.h
index 
0197888ad0e00b2f853d3f25ffa764f61cca7385..0cad0a2490e5efc194d874025eb3e3b846a5c7b4
 100644
--- a/include/vdso/limits.h
+++ b/include/vdso/limits.h
@@ -2,6 +2,9 @@
 #ifndef __VDSO_LIMITS_H
 #define __VDSO_LIMITS_H
 
+#define UCHAR_MAX      ((unsigned char)~0U)
+#define SCHAR_MAX      ((signed char)(UCHAR_MAX >> 1))
+#define SCHAR_MIN      ((signed char)(-SCHAR_MAX - 1))
 #define USHRT_MAX      ((unsigned short)~0U)
 #define SHRT_MAX       ((short)(USHRT_MAX >> 1))
 #define SHRT_MIN       ((short)(-SHRT_MAX - 1))
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab