mirror of https://github.com/mkerrisk/man-pages
s390_pci_mmio_write.2: Use syscall(SYS_...); for system calls without a wrapper; fix includes too
This function doesn't use any flags or special types, so there's no reason to include <asm/unistd.h>; remove it. Add the includes needed for syscall(2) only. Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -28,16 +28,19 @@ s390_pci_mmio_write, s390_pci_mmio_read \- transfer data to/from PCI
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MMIO memory page
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.SH SYNOPSIS
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.nf
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.B #include <asm/unistd.h>
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.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
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.B #include <unistd.h>
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.PP
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.BI "int s390_pci_mmio_write(unsigned long " mmio_addr ,
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.BI "int syscall(SYS_s390_pci_mmio_write, unsigned long " mmio_addr ,
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.BI " const void *" user_buffer ", size_t " length );
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.BI "int s390_pci_mmio_read(unsigned long " mmio_addr ,
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.BI "int syscall(SYS_s390_pci_mmio_read, unsigned long " mmio_addr ,
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.BI " void *" user_buffer ", size_t " length );
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.fi
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.PP
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.IR Note :
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There are no glibc wrappers for these system calls; see NOTES.
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glibc provides no wrappers for these system calls,
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necessitating the use of
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.BR syscall (2).
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.SH DESCRIPTION
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The
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.BR s390_pci_mmio_write ()
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@ -102,8 +105,5 @@ These system calls are available since Linux 3.19.
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.SH CONFORMING TO
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This Linux-specific system call is available only on the s390 architecture.
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The required PCI support is available beginning with System z EC12.
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.SH NOTES
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Glibc does not provide wrappers for these system calls; call them using
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.BR syscall (2)
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.SH SEE ALSO
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.BR syscall (2)
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