#include "reiserfs.h" #include /* * The previous reiserfs locking scheme was heavily based on * the tricky properties of the Bkl: * * - it was acquired recursively by a same task * - the performances relied on the release-while-schedule() property * * Now that we replace it by a mutex, we still want to keep the same * recursive property to avoid big changes in the code structure. * We use our own lock_owner here because the owner field on a mutex * is only available in SMP or mutex debugging, also we only need this field * for this mutex, no need for a system wide mutex facility. * * Also this lock is often released before a call that could block because * reiserfs performances were partially based on the release while schedule() * property of the Bkl. */ void reiserfs_write_lock(struct super_block *s) { struct reiserfs_sb_info *sb_i = REISERFS_SB(s); if (sb_i->lock_owner != current) { mutex_lock(&sb_i->lock); sb_i->lock_owner = current; } /* No need to protect it, only the current task touches it */ sb_i->lock_depth++; } void reiserfs_write_unlock(struct super_block *s) { struct reiserfs_sb_info *sb_i = REISERFS_SB(s); /* * Are we unlocking without even holding the lock? * Such a situation must raise a BUG() if we don't want * to corrupt the data. */ BUG_ON(sb_i->lock_owner != current); if (--sb_i->lock_depth == -1) { sb_i->lock_owner = NULL; mutex_unlock(&sb_i->lock); } } int __must_check reiserfs_write_unlock_nested(struct super_block *s) { struct reiserfs_sb_info *sb_i = REISERFS_SB(s); int depth; /* this can happen when the lock isn't always held */ if (sb_i->lock_owner != current) return -1; depth = sb_i->lock_depth; sb_i->lock_depth = -1; sb_i->lock_owner = NULL; mutex_unlock(&sb_i->lock); return depth; } void reiserfs_write_lock_nested(struct super_block *s, int depth) { struct reiserfs_sb_info *sb_i = REISERFS_SB(s); /* this can happen when the lock isn't always held */ if (depth == -1) return; mutex_lock(&sb_i->lock); sb_i->lock_owner = current; sb_i->lock_depth = depth; } /* * Utility function to force a BUG if it is called without the superblock * write lock held. caller is the string printed just before calling BUG() */ void reiserfs_check_lock_depth(struct super_block *sb, char *caller) { struct reiserfs_sb_info *sb_i = REISERFS_SB(sb); WARN_ON(sb_i->lock_depth < 0); } #ifdef CONFIG_REISERFS_CHECK void reiserfs_lock_check_recursive(struct super_block *sb) { struct reiserfs_sb_info *sb_i = REISERFS_SB(sb); WARN_ONCE((sb_i->lock_depth > 0), "Unwanted recursive reiserfs lock!\n"); } #endif option>
path: root/sound/soc/codecs/sta350.h
diff options
context:
space:
mode:
authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2017-01-29 15:07:34 +0300
committerDavid S. Miller <davem@davemloft.net>2017-01-30 22:05:43 -0500
commit1a0bee6c1e788218fd1d141db320db970aace7f0 (patch)
tree46c4116bc8ef4a7df718516a648597d9e21c15f1 /sound/soc/codecs/sta350.h
parent63c190429020a9701b42887ac22c28f287f1762f (diff)
sh_eth: rename EESIPR bits
Since the commit b0ca2a21f769 ("sh_eth: Add support of SH7763 to sh_eth") the *enum* declaring the EESIPR bits (interrupt mask) went out of sync with the *enum* declaring the EESR bits (interrupt status) WRT bit naming and formatting. I'd like to restore the consistency by using EESIPR as the bit name prefix, renaming the *enum* to EESIPR_BIT, and (finally) renaming the bits according to the available Renesas SH77{34|63} manuals; additionally, reconstruct couple names using the EESR bit declaration above... Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/soc/codecs/sta350.h')