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kpatch-syscall: Fix kpatch s390 build error when CONFIG_COMPAT is disabled

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When CONFIG_COMPAT is disabled (No 31 bit emulation support), macro
__S390_SYS_STUBx() is nop.
(See arch/s390/include/asm/syscall_wrapper.h).
Also, __SC_COMPAT_CAST definition is not available, which leads to build
error.

Hence, __KPATCH_S390_SYS_STUBx() inherited from __S390_SYS_STUBx() macro,
should point also point to nop when CONFIG_COMPAT is disabled.

Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
This commit is contained in:
Sumanth Korikkar 2025-01-03 16:55:01 +01:00
parent a9a7360a29
commit 55c118c942
1 changed files with 8 additions and 0 deletions
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8
kmod/patch/kpatch-syscall.h
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@ -109,6 +109,7 @@
/* arch/s390/include/asm/syscall_wrapper.h versions */
#if defined(KPATCH_SYSCALL_WRAPPERS_V1)
#if defined(CONFIG_COMPAT)
#define __KPATCH_S390_SYS_STUBx(x, name, ...) \
long __s390_sys##name(struct pt_regs *regs); \
ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
@ -119,6 +120,9 @@
__MAP(x,__SC_TEST,__VA_ARGS__); \
return ret; \
}
#else
#define __KPATCH_S390_SYS_STUBx(x, name, ...)
#endif /* CONFIG_COMPAT */
#define __KPATCH_SYSCALL_DEFINEx(x, name, ...) \
__diag_push(); \
@ -142,6 +146,7 @@
# else /* KPATCH_SYSCALL_WRAPPERS_V2 */
#if defined(CONFIG_COMPAT)
#define __KPATCH_S390_SYS_STUBx(x, name, ...) \
long __s390_sys##name(struct pt_regs *regs); \
ALLOW_ERROR_INJECTION(__s390_sys##name, ERRNO); \
@ -155,6 +160,9 @@
__MAP(x, __SC_TEST, __VA_ARGS__); \
return __kpatch_do_sys##name(__MAP(x, __SC_COMPAT_CAST, __VA_ARGS__)); \
}
#else
#define __KPATCH_S390_SYS_STUBx(x, name, ...)
#endif /* CONFIG_COMPAT */
#define __KPATCH_SYSCALL_DEFINEx(x, name, ...) \
long __s390x_sys##name(struct pt_regs *regs); \