I am also agree with Arnd Bergmann. We should use 'static inline function'
instead of macro to deal with error check.
On Tuesday 26 July 2016 05:09 PM, Arnd Bergmann wrote:
On Saturday, July 23, 2016 11:35:51 PM CEST Arvind Yadav wrote:
diff --git a/include/linux/err.h b/include/linux/err.h
index 1e35588..a42f942 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -19,6 +19,7 @@
#ifndef __ASSEMBLY__
#define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
+#define IS_ERR_VALUE_U32(x) unlikely((unsigned int)(x) >= (unsigned int)-MAX_ERRNO)
static inline void * __must_check ERR_PTR(long error)
{
This doesn't really look like something we want to have as a generic
interface. The IS_ERR_VALUE() API is rather awkward already, and your
use seems specific to the cpu_muram_alloc() function.
How about something like
int cpm_muram_error(unsigned long addr)
{
if (addr >= (unsigned long)-MAX_ERRNO)
return addr;
else
return 0;
}
and then use that to check the value returned by the allocation
that is still an 'unsigned long', before assigning it to a 'u32'.
Arnd
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