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[POWERPC] spufs: avoid spurious memory barriers

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We now have proper locking around assignets of the mapping pointers,
and the spin_unlock implies enough of a barrier to get rid of the
explicit one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christoph Hellwig 2007-04-23 21:08:21 +02:00 committed by Arnd Bergmann
parent db1384b40d
commit 8a7d86bdb2
1 changed files with 0 additions and 14 deletions
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14
arch/powerpc/platforms/cell/spufs/file.c
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@ -50,7 +50,6 @@ spufs_mem_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->local_store = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -64,7 +63,6 @@ spufs_mem_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->local_store = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -262,7 +260,6 @@ static int spufs_cntl_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->cntl = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return simple_attr_open(inode, file, spufs_cntl_get,
spufs_cntl_set, "0x%08lx");
}
@ -279,7 +276,6 @@ spufs_cntl_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->cntl = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -767,7 +763,6 @@ static int spufs_signal1_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->signal1 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return nonseekable_open(inode, file);
}
@ -781,7 +776,6 @@ spufs_signal1_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->signal1 = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -893,7 +887,6 @@ static int spufs_signal2_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->signal2 = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return nonseekable_open(inode, file);
}
@ -907,7 +900,6 @@ spufs_signal2_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->signal2 = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -1112,7 +1104,6 @@ static int spufs_mss_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->mss = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return nonseekable_open(inode, file);
}
@ -1126,7 +1117,6 @@ spufs_mss_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->mss = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -1172,7 +1162,6 @@ static int spufs_psmap_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->psmap = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return nonseekable_open(inode, file);
}
@ -1186,7 +1175,6 @@ spufs_psmap_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->psmap = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}
@ -1244,7 +1232,6 @@ static int spufs_mfc_open(struct inode *inode, struct file *file)
if (!i->i_openers++)
ctx->mfc = inode->i_mapping;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return nonseekable_open(inode, file);
}
@ -1258,7 +1245,6 @@ spufs_mfc_release(struct inode *inode, struct file *file)
if (!--i->i_openers)
ctx->mfc = NULL;
spin_unlock(&ctx->mapping_lock);
smp_wmb();
return 0;
}