linux-sg2042/arch/arm/include/asm/shmparam.h

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#ifndef _ASMARM_SHMPARAM_H
#define _ASMARM_SHMPARAM_H
/*
* This should be the size of the virtually indexed cache/ways,
* or page size, whichever is greater since the cache aliases
* every size/ways bytes.
*/
#define SHMLBA (4 * PAGE_SIZE) /* attach addr a multiple of this */
/*
* Enforce SHMLBA in shmat
*/
#define __ARCH_FORCE_SHMLBA
#endif /* _ASMARM_SHMPARAM_H */