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(parent: 6ee636c) | patch
s390/vdso: optimize getcpu system call
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 5 Jan 2016 12:29:38 +0000 (13:29 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Mon, 11 Jan 2016 12:01:24 +0000 (13:01 +0100)
commit390dfd477cc5195e709f2a58a5bf096f4f7f6a84
tree956a0719238b56b8dffa3877d3fe3eb5c27df9f4tree | snapshot
parent6ee636cd4d249005c7a8da42ccbe1a101351e19fcommit | diff
s390/vdso: optimize getcpu system call

Add the CPU number to the per-cpu vdso data page and add the
__kernel_getcpu function to the vdso object to retrieve the
CPU number in user space.

Suggested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/include/asm/vdso.h diff | blob | history
arch/s390/kernel/asm-offsets.c diff | blob | history
arch/s390/kernel/vdso.c diff | blob | history
arch/s390/kernel/vdso32/Makefile diff | blob | history
arch/s390/kernel/vdso32/getcpu.S [new file with mode: 0644] blob
arch/s390/kernel/vdso32/vdso32.lds.S diff | blob | history
arch/s390/kernel/vdso64/Makefile diff | blob | history
arch/s390/kernel/vdso64/getcpu.S [new file with mode: 0644] blob
arch/s390/kernel/vdso64/vdso64.lds.S diff | blob | history
Linux Kernel Source Tree.