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[PATCH] Add epoll compat_ code to fs/compat.c

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IA64 and ARM-OABI are currently using their own version of epoll compat_
code.

An architecture needs epoll_event translation if alignof(u64) in 32 bit
mode is different from alignof(u64) in 64 bit mode.  If an architecture
needs epoll_event translation, it must define struct compat_epoll_event in
asm/compat.h and set CONFIG_HAVE_COMPAT_EPOLL_EVENT and use
compat_sys_epoll_ctl and compat_sys_epoll_wait.

All 64 bit architecture should use compat_sys_epoll_pwait.

[sfr: restructure and move to fs/compat.c, remove MIPS version
of compat_sys_epoll_pwait, use __put_user_unaligned]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davide Libenzi 2007-03-07 20:41:21 -08:00 • committed by Linus Torvalds
parent b40df5743e
commit f6dfb4fd7d
3 changed files with 119 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

19
include/linux/compat.h
View file

@ -234,5 +234,24 @@ asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
const compat_ulong_t __user *new_nodes);
/*
* epoll (fs/eventpoll.c) compat bits follow ...
*/
#ifndef CONFIG_HAS_COMPAT_EPOLL_EVENT
struct epoll_event;
#define compat_epoll_event epoll_event
#else
asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
struct compat_epoll_event __user *event);
asmlinkage long compat_sys_epoll_wait(int epfd,
struct compat_epoll_event __user *events,
int maxevents, int timeout);
#endif
asmlinkage long compat_sys_epoll_pwait(int epfd,
struct compat_epoll_event __user *events,
int maxevents, int timeout,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
#endif /* CONFIG_COMPAT */
#endif /* _LINUX_COMPAT_H */