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| author | Russell King <[email protected]> | 2015-04-03 10:15:53 +0000 |
|---|---|---|
| committer | Russell King <[email protected]> | 2015-04-14 21:26:51 +0000 |
| commit | 47b8484ea6569511a3cd915bea29886b4cd08333 (patch) | |
| tree | c4f80e72ea340c972fcf55cf13b7c27d223bc31b /net/unix/af_unix.c | |
| parent | ARM: cache-v7: use movw/movt instructions (diff) | |
| download | kernel-47b8484ea6569511a3cd915bea29886b4cd08333.tar.gz kernel-47b8484ea6569511a3cd915bea29886b4cd08333.zip | |
ARM: cache-v7: shift CLIDR to extract appropriate field before masking
Rather than have code which masks and then shifts, such as:
mrc p15, 1, r0, c0, c0, 1
ALT_SMP(ands r3, r0, #7 << 21)
ALT_UP( ands r3, r0, #7 << 27)
ALT_SMP(mov r3, r3, lsr #20)
ALT_UP( mov r3, r3, lsr #26)
re-arrange this as a shift and then mask. The masking is the same for
each field which we want to extract, so this allows the mask to be
shared amongst code paths:
mrc p15, 1, r0, c0, c0, 1
ALT_SMP(mov r3, r0, lsr #20)
ALT_UP( mov r3, r0, lsr #26)
ands r3, r3, #7 << 1
Use this method for the LoUIS, LoUU and LoC fields.
Reviewed-by: Catalin Marinas <[email protected]>
Signed-off-by: Russell King <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions