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authorFiroz Khan <firoz.khan@linaro.org>2018-11-13 12:27:42 +0530
committerTony Luck <tony.luck@intel.com>2018-11-13 08:56:06 -0800
commitd7c5e82c08a0fb8b8d5186cdcb6d2c54ada4076b (patch)
treefd88c611554d7904f6d4cccc965fb64748641e47 /arch/ia64/include
parentd272a735ef54bf0fbf62673f160bd3d335d1a510 (diff)
downloadlinux-d7c5e82c08a0fb8b8d5186cdcb6d2c54ada4076b.tar.bz2
ia64: add __NR_syscalls along with NR_syscalls
NR_syscalls macro holds the number of system call exist in ia64 architecture. We have to change the value of NR- _syscalls, if we add or delete a system call. One of the patch in this patch series has a script which will generate a uapi header based on syscall.tbl file. The syscall.tbl file contains the total number of system calls information. So we have two option to update NR_sy- scalls value. 1. Update NR_syscalls in asm/unistd.h manually by count- ing the no.of system calls. No need to update NR_sys- calls until we either add a new system call or delete existing system call. 2. We can keep this feature it above mentioned script, that will count the number of syscalls and keep it in a generated file. In this case we don't need to expli- citly update NR_syscalls in asm/unistd.h file. The 2nd option will be the recommended one. For that, I added the __NR_syscalls macro in uapi/asm/unistd.h along with NR_syscalls asm/unistd.h. The macro __NR_syscalls also added for making the name convention same across all architecture. While __NR_syscalls isn't strictly part of the uapi, having it as part of the generated header to simplifies the implementation. We also need to enclose this macro with #ifdef __KERNEL__ to avoid side effects. Signed-off-by: Firoz Khan <firoz.khan@linaro.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include')
-rw-r--r--arch/ia64/include/asm/unistd.h4
-rw-r--r--arch/ia64/include/uapi/asm/unistd.h4
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h
index 49e34db2529c..0b08ebd2dfde 100644
--- a/arch/ia64/include/asm/unistd.h
+++ b/arch/ia64/include/asm/unistd.h
@@ -10,9 +10,7 @@
#include <uapi/asm/unistd.h>
-
-
-#define NR_syscalls 326 /* length of syscall table */
+#define NR_syscalls __NR_syscalls /* length of syscall table */
/*
* The following defines stop scripts/checksyscalls.sh from complaining about
diff --git a/arch/ia64/include/uapi/asm/unistd.h b/arch/ia64/include/uapi/asm/unistd.h
index 94b835cc4f11..388ab4e23a18 100644
--- a/arch/ia64/include/uapi/asm/unistd.h
+++ b/arch/ia64/include/uapi/asm/unistd.h
@@ -341,4 +341,8 @@
#define __NR_preadv2 1348
#define __NR_pwritev2 1349
+#ifdef __KERNEL__
+#define __NR_syscalls 326
+#endif
+
#endif /* _UAPI_ASM_IA64_UNISTD_H */