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m68k: Remove never used asm/shm.h 

m68k's asm/shm.h header has been part of the tree ever since m68k
support got added in v1.3.94. (It started as /include/asm-m68k/shm.h and
moved to its current location a few years ago.) It seems it was never
used: no file ever included it and nothing used the macros it defines.

(Actually, from v2.5.46 until v2.6.29-rc3 it was included by m68knommu's
asm/shm.h. But that header was just a very thin wrapper for this header
and was itself unused too.)

This header can safely be removed.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Paul Bolle 2012-06-22 12:33:41 +02:00 committed by Geert Uytterhoeven
parent d670b47958
commit a8ab98484a
1 changed files with 0 additions and 31 deletions
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31
arch/m68k/include/asm/shm.h
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@ -1,31 +0,0 @@
#ifndef _M68K_SHM_H
#define _M68K_SHM_H
/* format of page table entries that correspond to shared memory pages
currently out in swap space (see also mm/swap.c):
bits 0-1 (PAGE_PRESENT) is = 0
bits 8..2 (SWP_TYPE) are = SHM_SWP_TYPE
bits 31..9 are used like this:
bits 15..9 (SHM_ID) the id of the shared memory segment
bits 30..16 (SHM_IDX) the index of the page within the shared memory segment
(actually only bits 25..16 get used since SHMMAX is so low)
bit 31 (SHM_READ_ONLY) flag whether the page belongs to a read-only attach
*/
/* on the m68k both bits 0 and 1 must be zero */
/* format on the sun3 is similar, but bits 30, 31 are set to zero and all
others are reduced by 2. --m */
#ifndef CONFIG_SUN3
#define SHM_ID_SHIFT 9
#else
#define SHM_ID_SHIFT 7
#endif
#define _SHM_ID_BITS 7
#define SHM_ID_MASK ((1<<_SHM_ID_BITS)-1)
#define SHM_IDX_SHIFT (SHM_ID_SHIFT+_SHM_ID_BITS)
#define _SHM_IDX_BITS 15
#define SHM_IDX_MASK ((1<<_SHM_IDX_BITS)-1)
#endif /* _M68K_SHM_H */