fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-s390 / cpcmd.h
blob48a9eab1642972f49d666188962e05d1d41af6f1
1 /*
2 * arch/s390/kernel/cpcmd.h
4 * S390 version
5 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
7 * Christian Borntraeger (cborntra@de.ibm.com),
8 */
10 #ifndef _ASM_S390_CPCMD_H
11 #define _ASM_S390_CPCMD_H
14 * the lowlevel function for cpcmd
15 * the caller of __cpcmd has to ensure that the response buffer is below 2 GB
17 extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code);
20 * cpcmd is the in-kernel interface for issuing CP commands
22 * cmd: null-terminated command string, max 240 characters
23 * response: response buffer for VM's textual response
24 * rlen: size of the response buffer, cpcmd will not exceed this size
25 * but will cap the output, if its too large. Everything that
26 * did not fit into the buffer will be silently dropped
27 * response_code: return pointer for VM's error code
28 * return value: the size of the response. The caller can check if the buffer
29 * was large enough by comparing the return value and rlen
30 * NOTE: If the response buffer is not below 2 GB, cpcmd can sleep
32 extern int cpcmd(const char *cmd, char *response, int rlen, int *response_code);
34 #endif /* _ASM_S390_CPCMD_H */