Commit 806cbae1 authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

fs: add ksys_sync_file_range helper(); remove in-kernel calls to syscall 

Using this helper allows us to avoid the in-kernel calls to the
sys_sync_file_range() syscall. The ksys_ prefix denotes that this function
is meant as a drop-in replacement for the syscall. In particular, it uses
the same calling convention as sys_sync_file_range().

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net



Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent e2aaa9f4

arch/mips/kernel/linux32.c

+1 −1
Original line number Diff line number Diff line
@@ -139,7 +139,7 @@ asmlinkage long sys32_sync_file_range(int fd, int __pad, 
	unsigned long a4, unsigned long a5,

	int flags)

{

	return sys_sync_file_range(fd,

	return ksys_sync_file_range(fd,

			merge_64(a2, a3), merge_64(a4, a5),

			flags);

}

arch/parisc/kernel/sys_parisc.c

+1 −1
Original line number Diff line number Diff line
@@ -360,7 +360,7 @@ asmlinkage long parisc_sync_file_range(int fd, 
			u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,

			unsigned int flags)

{

	return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,

	return ksys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,

			(loff_t)hi_nbytes << 32 | lo_nbytes, flags);

}

arch/powerpc/kernel/sys_ppc32.c

+1 −1
Original line number Diff line number Diff line
@@ -124,5 +124,5 @@ asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, 
	loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;

	loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;



	return sys_sync_file_range(fd, offset, nbytes, flags);

	return ksys_sync_file_range(fd, offset, nbytes, flags);

}

arch/s390/kernel/compat_linux.c

+1 −1
Original line number Diff line number Diff line
@@ -509,7 +509,7 @@ COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, arg 
COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow,

		       u32, nhigh, u32, nlow, unsigned int, flags)

{

	return sys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,

	return ksys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,

				   ((u64)nhigh << 32) + nlow, flags);

}

arch/sparc/kernel/sys_sparc32.c

+1 −1
Original line number Diff line number Diff line
@@ -241,7 +241,7 @@ long compat_sys_fadvise64_64(int fd, 


long sys32_sync_file_range(unsigned int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, unsigned int flags)

{

	return sys_sync_file_range(fd,

	return ksys_sync_file_range(fd,

				   (off_high << 32) | off_low,

				   (nb_high << 32) | nb_low,

				   flags);

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